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Leidy Pages From Leidy 255-10
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1856.] 255 Obs. This bird was given in Mr. Peak's volume on the Birds and Quadrupeds of Capt. Wilkes's Expedition, as Zapornia spilonota, Gould, but though very pro- bably of the same genus, is distinct, and we have not found it described. T. Tachypetes Palmerstoni, (Gmelin.) Pelecanus Palmerstoni, Gm. Syst. Nat. i. p. 573, (1788.) Obs. This is a species quite distinct from T. aquila, and is apparently exclu- sively an inhabitants of the Pacific Ocean. From that species the present bird may readily be distinguished by its much larger gular pouch, which in the living bird is of a red color. Its quills and tail feathers are much narrower and the latter is longer. So far as can be determined from preserved specimens, the two species are nearly of the same size, thongh the present bird is the more slender. Numerous specimens are in the collection of the Exploring Expedition, (Vincennes and Peacock.) Notices of Remains of Extinct Vertebrated Animals discovered by Professor E. Emvions. By Joseph Leidt, M. D. Cetacea. 1. Orycterocetus cornctidens, Leidy. 0. quadratidens, Proc. A. N. S. VII, 378. The genus was originally proposed 6n several long horn-like teeth, together with fragments of jaws found in the miocene deposit of Virginia. Prof. Em- mons has also discovered a tooth, apparently of the same species, in the mio- cene deposite of North Carolina. The tooth bears a wonderful resemblance to the horn of a young ox. It is nearly 5 inches long in the curve and over an inch in diameter at base, which is hollowed into a deep conical cavity, as in the spermaceti whale. Sauria. 2. Drepanodon impar, Leidy. This species is founded on the crown of a tooth discovered by Prof, Emmons in the miocene deposit of Cape Fear, North Carolina. The specimen, in form, bears a strong resemblance to the crown of the in- ferior canine tooth of a bear, but it has only one trenchant ridge, and this is situated postero-internally. The enamel is thin and smooth ; the base of the crown is hollowed conically. Length of specimen 10 lines; breadth at base antero-posteriorly 7 lines, transversely 5 lines. 3. Pliogonodon priscus, Leidy. Founded on two much mutilated specimens, consisting of the crowns of teeth, discovered by Professor Emmons in a miocene deposite of Cape Fear, in North Carolina. Teeth elongated conical, nearly straight or only slightly curved inwardly, in section circular, with a pair of opposed carinaa on the inner side ; surfaces divided into numerous narrow planes, with a few vertical interrui^ted plicae, which are more numerous on the inner side, ^namel finely wrinkled ; and the dentine concentric. Base of crown hollowed. Probable length of crown when perfect 2 inches, breadth of base |- of an inch. The teeth differ from those of 3fososaurus in their narrower proportion, straightness, circular section, and plicae of the enamel ; from those of Polypty- cliodon in the possession of divisional planes and opposed carinag ; and from those of Pleiosaurus in the former character and the circular section. 4. Pal-5:osaurus ? (Compsosaurus) priscus, Leidy : ante p. 165. Half a dozen isolated teeth of this saurian are contained in the collection of Prof. Emmons.
description
leidy
Transcript of Leidy Pages From Leidy 255-10
1856.] 255
Obs. This bird was given in Mr. Peak's volume on the Birds and Quadrupedsof Capt. Wilkes's Expedition, as Zapornia spilonota, Gould, but though very pro-bably of the same genus, is distinct, and we have not found it described.
T. Tachypetes Palmerstoni, (Gmelin.)Pelecanus Palmerstoni, Gm. Syst. Nat. i. p. 573, (1788.)Obs. This is a species quite distinct from T. aquila, and is apparently exclu-
sively an inhabitants of the Pacific Ocean. From that species the present bird
may readily be distinguished by its much larger gular pouch, which in the
living bird is of a red color. Its quills and tail feathers are much narrower andthe latter is longer. So far as can be determined from preserved specimens, thetwo species are nearly of the same size, thongh the present bird is the moreslender.
Numerous specimens are in the collection of the Exploring Expedition,(Vincennes and Peacock.)
Notices of Remains of Extinct Vertebrated Animals discovered by Professor E.Emvions.
By Joseph Leidt, M. D.
Cetacea.
1. Orycterocetus cornctidens, Leidy.0. quadratidens, Proc. A. N. S. VII, 378.
The genus was originally proposed 6n several long horn-like teeth, togetherwith fragments of jaws found in the miocene deposit of Virginia. Prof. Em-mons has also discovered a tooth, apparently of the same species, in the mio-cene deposite of North Carolina. The tooth bears a wonderful resemblance to
the horn of a young ox. It is nearly 5 inches long in the curve and over aninch in diameter at base, which is hollowed into a deep conical cavity, as in
the spermaceti whale.
Sauria.
2. Drepanodon impar, Leidy.This species is founded on the crown of a tooth discovered by Prof, Emmons
in the miocene deposit of Cape Fear, North Carolina.
The specimen, in form, bears a strong resemblance to the crown of the in-
ferior canine tooth of a bear, but it has only one trenchant ridge, and this is
situated postero-internally. The enamel is thin and smooth;the base of the
crown is hollowed conically. Length of specimen 10 lines; breadth at base
antero-posteriorly 7 lines, transversely 5 lines.
3. Pliogonodon priscus, Leidy.Founded on two much mutilated specimens, consisting of the crowns of teeth,
discovered by Professor Emmons in a miocene deposite of Cape Fear, in NorthCarolina.
Teeth elongated conical, nearly straight or only slightly curved inwardly, in
section circular, with a pair of opposed carinaa on the inner side;surfaces
divided into numerous narrow planes, with a few vertical interrui^ted plicae,
which are more numerous on the inner side, ^namel finely wrinkled;and the
dentine concentric. Base of crown hollowed. Probable length of crown whenperfect 2 inches, breadth of base
|-of an inch.
The teeth differ from those of 3fososaurus in their narrower proportion,
straightness, circular section, and plicae of the enamel;from those of Polypty-
cliodon in the possession of divisional planes and opposed carinag;and from
those of Pleiosaurus in the former character and the circular section.
4. Pal-5:osaurus ? (Compsosaurus) priscus, Leidy : ante p. 165.
Half a dozen isolated teeth of this saurian are contained in the collection of
Prof. Emmons.
256 [October,
5. Omosaurus perplexus, Leidy.An enaliosaurian, based upon a number of teeth of varied character, vertebrae,
fragments of ribs and other bones, and the impression of a dermal pLxte, obtainedfrom the coal field of Chatham Co., North Carolina, by Prof. Emmons and also
by Prof. M. Tuomey.Teeth elongated conical, pointed, nearly straight, or n:ore or less mo-
derately curved inwardly, with opposed carinte on the inner side, whichare entire or denticulated
;transverse section subcircular, flattened in-
ternally ;surfaces even, or more or less distinctly fluted on the outer side or all
around, and covered with minute interrupted ridges, which are vertical on the
even surface, oblique on the fluted surface, and divergent downward in the vi-
cinity of the carinas. Crown solid, enamel thin, dentine concentric; fang sub-
cylindrical, hollowed at base. Length from 5 lines to 1^ inches, breadth from2 lines to 4| lines.
Bodies of the vertebrse bi-concave and much constricted, as m Palceosaw'us?
and Ch-jKysaunis. Length of one of the posterior cervical bodies 16 lines,
depth of its articular surfaces 17 lines, width 15 lines.
Dermal plate covered with radiating, bifurcating and anastomosing ridges.Allied to Clepsysaurus and Centemodon, Lea, and probably identical with them.
Labyrinthodonta.
6. DicTYOCEPHALUS KLEGANS, Leidy.Founded on the upper portion of a cranium discovered by Prof. Emmons in
the coal-field of Chatham Co., N. C. Plates of the cranium covered with reti-
cular ridges in a general radiant manner. Parietals comparatively short,broader in front than behind
; parietal foramen near the centre of the bones.
Occipitals quadrate, a little longer than broad. Posterior outline of the craniumwith a superficial transverse concavity on each side and not a deep sinus as in
Trematosaurus and Arcliegosmirus. Breadth of occipital outline 28 lines; length
of parietals 8J- lines, breath anteriorly 3J lines, posteriorly 3 lines. Probable
length of head, considering it to have had nearly the proportions of Tremato-
saurus, 4 inches, breadth 2^- inches.
Pisces.
7. IscHTRHiZA AXTiQUA, Leidy.The genus was originally based on a tooth found in the Green Sand of New
Jersey. Two teeth aj^parently of a second speceis have been obtained by Prof.
Emmons on the Neuse River, N. C.
Crown of the teeth, when perfect, apparently, laterally compressed conical.
Fang robust, quadrately pyramidal, curved;with a rugged base which is bifur-
cated antero-posteriorly and more deeply before than behind. Pulp cavity en-
tirely closed at bottom. Probable length of specimens when entire IJ, and 2
inches; length of fang 10 lines, and 1 inch;breadth of crown at base antero-
posteriorly 5 lines, 6 lines; laterally 3| 1., 4|- 1.
;breath of fang at bottom an-
tero-posteriorly 71., 8^ 1.; laterally 6J 1 7 1.
Notice of some Remains of Fishes discovered hy Dr. John E. Evans.
By Joseph Leidy, M. D.
1. Clupea humilis, Leidy.Founded on an impression of the fish upon one half of a clay stone nodule
from a tertiary deposit of Green River, Missouri. '
Length 3^- inches; greatest depth 16 lines. Dorsal fin with 15 rays; abdo-minal 7, anal 14; caudal 20? From the head to the position of the anus 28
abdominal spines may be counted.
2. Cladocyclus? occidentalis, Leidy.Based on specimens of isolated scales, attached to masses of an ash-colored
chalk, from the cretaceous deposite of the upper Missouri.
