Account of the Stomach of the Gillaroo Trout. In a Letter from Mr. Henry Watson to SirJohn PringleAuthor(s): Henry WatsonSource: Philosophical Transactions (1683-1775), Vol. 64 (1774), pp. 121-123Published by: The Royal SocietyStable URL: http://www.jstor.org/stable/105994 .

Accessed: 24/06/2014 21:35

Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at .http://www.jstor.org/page/info/about/policies/terms.jsp

.JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range ofcontent in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new formsof scholarship. For more information about JSTOR, please contact support@jstor.org.

.

The Royal Society is collaborating with JSTOR to digitize, preserve and extend access to PhilosophicalTransactions (1683-1775).

http://www.jstor.org

This content downloaded from 195.78.108.81 on Tue, 24 Jun 2014 21:35:35 PMAll use subject to JSTOR Terms and Conditions

XV. Acaoant of t StoffXach of the oo Sfrovr. In a Bexer frog Mr. Fftn Watfion to Sir John Pringle

SIRs

Etedde- Jan 2;t, H E reque§, you was pleafed td

774 1 make to me, in the name of the Royal SoQety, that, - at lMy leifure, I wouXd eXalzlint iIltO tht firuEture of the Romach of the Gillaroo trouts I llz:all tlOW endeavour to comply weth, in the beR manller IS aln ableJ

The Rat¢ in which I received this Rotnach, disl ot admitf of the moIt accurate examinatiorl; and

the imach of bthe ctmmon troutX fent to me at the. fame. . time, was So .: hardened, and .fEriveIled up?:iI cou.ld hy. no means unfold it, or draw ilxy compariforl b.etvs^eexl thetn.

The- Ilomach. of the- Glllaroo trout tmay. be divided .at . l¢.alE.. illtO three coats ;-at.ls itlternal^ a

mlddre, and an exteilli1> otlc The estertlaL i$ a kindsof ?eritonzal coveritg,

commoll wr tlit Ilomaskw luteRines aud other wcerv.

Tlle middle coat appearsto be of a:fibrous muScular textures pretty etthicl; ii ^, Itrog¢r than in the falmou; . and -of a jrellowsih cOur

VOL . LSIV. k The

* s:

x:t J *

This content downloaded from 195.78.108.81 on Tue, 24 Jun 2014 21:35:35 PMAll use subject to JSTOR Terms and Conditions

s 122 ]

The itrnal coat; has a mugh, but not tUgOU5 {iarfice. It is ftongy and wrhaps glindulY, with a kind of hbawey-comb texture, allJ ilmng i?ilE, a- littles fimiht io the intBnlal appearance of ffic gan-bladder in&>the humat fibje&; and 114 d roUid make an etegant fiPs, was it well in- jeEed. This> ttR, iS ti moX that I am at t able to bbErve upon the lbuAure of this q:

But, as the Xmach ofathe Gi}laroo ttAt z fuppoid to zrim the of}ice of a gizzard;, ie

nzay be neceMry to examxne a littleX how fat they agmeJ

The gIzzard, in birds of -*e: gallitdaxous kii, is compoid of ltrp maflesE of felF aild endon; betwee l which Iies the flomachs d;fl:rong, denSefi cartilaginous, or homy bags firnifhed Wlth ;r tlCtit tagZ, and &@+ iws>; but w-e hYe w-ne

of tbe-fe appearances in de-ffimach of thcat;il Iaroo erout; it doeso not ffiew the« eaR re femblance; 1lor can I tliink it wlll bear any tcom. pariX1, with the gizzabd in fowls; tztor ifs- it at all conclufive, that the Eomach of this trout peiforms the office of a gizzard? becaufie fEwral iaS1 fiails we found suthin it, fbr mght we not as well concl that the coca annexA wto the v and which are, in this fiih, very numerous, and baded witll the fame tittle fhells, do the offices of b many giitO > But we know that the

am ilan&}>r pxc}esa and do the oflke of

a yancreas. If the ftomach of the Gillaroo troue does not

appear to corewd with the krud:ture of the giz sard sn fow}s, nelther does it agree, it1 evev reEpe4

with

This content downloaded from 195.78.108.81 on Tue, 24 Jun 2014 21:35:35 PMAll use subject to JSTOR Terms and Conditions

[ I:3 ] wxth the appearances commS onslyiohIervedin fiiMes It is indeed membranous sand wnuScularj but its internal furfi^ace i5 not fo fmooth whlte, and tZ liXhed; -nor is it made up into iVte 614 or {?lssss as xve commonly idFlt as mo E^¢s; In me xndeed, ore rqrernbling a gat, than a kom - * btlt the internal furfacefi in the fiomach of the Giliaroo trout, is rough, and overmfpread -wsth silli, hich are fo firong, they may be eafill-y fea with the naked eye, and wbish I harre never ob Nerved ill the llomach of any other hfh.

Upon the whole, we may ventura to xncljude, that there are Soxne fingulantiest illr the llrud:urse of tlle Somach, whicb may rhaps -be psculiar to the Cillaroo erout.

If, in the bet} manner INhavc b£en able to pre- pare this Romach, you ffiould think it worth pre- Ierring, I hope it may poffle& a corller in thc MuScum of othe Royal SRcieq. 1 a

sxt,,.

ssth grst r,

Yburnoft bbedicutX

hgmble I*ervaatt Rsthbone-pL^ce, HENBwY WATSO.

XVJ. X

This content downloaded from 195.78.108.81 on Tue, 24 Jun 2014 21:35:35 PMAll use subject to JSTOR Terms and Conditions