Notes on the microzoa from the jurassic beds at hartwell
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9 6 NOTES ON THE MICROZOA FROM THE JURASSIC BEDS AT HARTWELL. Bv FREDERICK CHAPMAN, A.L.S., F.R.M.S. HAVING been favoured some years ago with fossiliferous material from Hartwell by Thos. Barron, Esq., F.G.S., and more recently by E. E. L. Dixon, Esq., who, in fact, collected some samples on the occasion of the last excursion of the Association to Hartwell, I have drawn up the following lists of the Microzoa obtained from these samples, since they present some special points of interest. Ostracoda from the Lower Purbeck, Bugle Pit, Hartwell : Cypris purbeckensis, Forbes. Very common. " " var. renijormis, Jones. Rare. Candona ansata, Jones. Common. " bononiensis, Jones. Frequent. Cypridea puftctata (Forbes).* Rare. Metacypris forbesii, Jones. t Very rare. Cythere retirugata, Jones. Common. " " var, textilis, Jones. Frequent. The sandy and glauconitic Hartwell Clay contains a few Ostracoda and Foraminifera of much interest, Which present a facies nearly comparable with that of Neocomian strata as far as it is known, and also in some respects comparable with that of the Gault. The list given below is preliminary to some further and more detailed work upon-which I am engaged with regard to beds of similar age in this and otber localities. Ostracoda-from 'the Hartwell Clay. Cythere drupacea, Jones, 1$84, Quart ..Iourn. Ceol. Soc., vol. xl, p. 772, pI. xxxiv, fig. 30. Cytheropteron drupaceum, Chapman, 1894, Quart . .Iourn. Ceol. Soc., vol, I, p. 691. This form has been described from the Great Oolite beds of the Richmond Well boring, and from the Neocomian (Bargate) beds near Guildford .. Judging from the example now found, this species appears properly to belong to the genus Cythere, and not to Cytheropteron. Cytheridea subpet/orata, Jones, 1884, Quart. four», Ceol. Soc., vol. xl, pp. 768 and 772, pl. xxxiv, figs. 25 and 26. Chap- man, 1894, Quart. .Iourn. Ceol. Soc., vol. I, p. 689. Like the preceding, this species was originally described from the Rich. • Recorded by Prof. T. R. Jones from the Middle and Upper Purbecks. Quart. fo"n<. Geoi. Soc, vol. xli (18BS), pp. 332 and 335. t Previously noted as H Rare and peculiar to Middle Purbeck." Prof. T. R. Jones) Quart. Jou,n. Ceol. Soc., vol. xli (,BBS), p, 336; also p. 332. JULY, 1897.]
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Transcript of Notes on the microzoa from the jurassic beds at hartwell
96
NOTES ON THE MICROZOA FROM THE JURASSICBEDS AT HARTWELL.
Bv FREDERICK CHAPMAN, A.L.S., F.R.M.S.
HAVING been favoured some years ago with fossiliferousmaterial from Hartwell by Thos. Barron, Esq., F.G.S., and morerecently by E. E. L. Dixon, Esq., who, in fact, collected somesamples on the occasion of the last excursion of the Associationto Hartwell, I have drawn up the following lists of the Microzoaobtained from these samples, since they present some specialpoints of interest.
Ostracoda from the Lower Purbeck, Bugle Pit, Hartwell :
Cypris purbeckensis, Forbes. Very common." " var. renijormis, Jones. Rare.
Candona ansata, Jones. Common." bononiensis, Jones. Frequent.
Cypridea puftctata (Forbes).* Rare.Metacypris forbesii, Jones. t Very rare.Cythere retirugata, Jones. Common.
" " var, textilis, Jones. Frequent.
The sandy and glauconitic Hartwell Clay contains a fewOstracoda and Foraminifera of much interest, Which presenta facies nearly comparable with that of Neocomian strata as far asit is known, and also in some respects comparable with that ofthe Gault.
The list given below is preliminary to some further and moredetailed work upon-which I am engaged with regard to beds ofsimilar age in this and otber localities.
Ostracoda-from 'the Hartwell Clay.Cythere drupacea, Jones, 1$84, Quart..Iourn. Ceol. Soc., vol. xl,
p. 772, pI. xxxiv, fig. 30. Cytheropteron drupaceum, Chapman,1894, Quart. .Iourn. Ceol. Soc., vol, I, p. 691. This form has beendescribed from the Great Oolite beds of the Richmond Wellboring, and from the Neocomian (Bargate) beds near Guildford..Judging from the example now found, this species appearsproperly to belong to the genus Cythere, and not to Cytheropteron.
Cytheridea subpet/orata, Jones, 1884, Quart. four», Ceol.Soc., vol. xl, pp. 768 and 772, pl. xxxiv, figs. 25 and 26. Chapman, 1894, Quart. .Iourn. Ceol. Soc., vol. I, p. 689. Like thepreceding, this species was originally described from the Rich.
• Recorded by Prof. T. R. Jones from the Middle and Upper Purbecks. Quart. fo"n<.Geoi. Soc, vol. xli (18BS),pp. 332 and 335.
t Previously noted as H Rare and peculiar to Middle Purbeck." Prof. T. R. Jones)Quart. Jou,n. Ceol. Soc., vol. xli (,BBS), p, 336; also p. 332.
JULY, 1897.]
EXCURSION TO WALMER, ST. MARGARETS, DOVER, ETC. 97
mond Well boring, and was found in the junction-bed of theOolite and (?) Neocomian. It was latterly found in theNeocomian (Bargate) beds near Guildford.
Foraminifera from the Hartwell Clay.Tritaxia (?) variabilis, Brady.Lagena lavis (Montagu).Nodosaria raphanus (Linne).Marginulina (?)jonesi, Reuss.Vaginulina discors, Koch.
" harpa, Romer.Cristellaria italica (Defrance).
" navicula, d'Orb." sukifera, Reuss." humilis, Reuss." fragaria (Gumbel)." gibba, d'Orb." convergens, Bornemann." cultrata (Montfort).
Globigerina marginata (Reuss).
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EXCURSION TO WALMER, ST. MARGARETS,
DOVER, FOLKESTONE, AND ROMNEY MARSH.
EASTER, 1897.
Directors: GEORGE DOWKER, F.G.S., W. F. GWINNELL, F.G.S.,
DR. A. W. ROWE, F.G.S., and C. DAVIES SHERBORN, F.Z.S.
Excursion Secretary: E. P. RIDLEY, F.G.S.
(Rep01"! by DR. ROWE and MR. SHERBORN.)
Friday, April 16th, and Saturday, April 17th.-Dr. A. W.Rowe, M.R.C.S., F.G.S., and C. Davies Sherborn acted asDirectors.
The party took the train to Walmer and walked through thepicturesque old town to the sea. Turning south towards St.Margaret's Bay, coIlecting all the time, the members noted thevery variable distribution of organic remains in this portion of theMicraster cor-anguinum-zone. That part of the cliff above thegrassy slope is fairly rich, while that part along the shore afterpassing the grassy slopes is comparatively barren. Proceedingnext morning to St Margaret's Bay, over the downs from Dover,
JULY, 1897.]
