I -2 -2 



AOllIOLIMAX L.EVIS. 



Description. — Animal ratlier slender, f^Iossy, and sniciDtli, and of a pecnliar 

 se)ni-f;elatin(iiis cimsistency, nsnally of a veililisli-browii or chocolate colour, and 

 M'hen contracted liearin^ a ,i;Teat resetnldaTice to a short plump \vorni ; liOl*'^' rounded, 

 with some distinct and rather proinincnt tuljercles ; taii. keeleil ; SIirLLU larLje, 

 rounded in fiont anil Itehind, and somewhat jialer in crdour than the l>oily, stroii;;ly 

 concciitrically ridded around a sulecentral and lati'i;illy-placed nucleus; NECK very 

 hiufj;-, nnikin;,' tlie shield seem to he nearly centially |ilaced ; TEN TACLES Idack and 

 very thick, witlr larf,'e Idack hulhs : |.'(mit lonj;itudinally tripartite, lij;ht brown, with 

 median area more transparent and a]i|iai-ently ilarker. The hody .MUCLJs is abundant. 



ilky and turbid 

 visi-id and tenacious. 



ibliijue riil,i;e from the 



Fi.;. 129. — Internal 

 slieli of .4. /ui'is, Y 4. 



(Steeton, 'i'ork.'i., Jlr. 

 F. RtloJes). 



Length, 3 mil 



clear ami watery, Imt after ciDitinued irritation lends to Ik 

 with nuTiute ]iarticles of lime: the locomotm-y mucus is im 



Sm-'.f.E oblong-o\'al in shape, and sho^\'ing an imlistiii 

 apex to the anterior right siile of the sliell, corres- 

 ]ioiiding somewhat to tlie gonial ridge ' of the 

 f'elecypoda ; white and glistening, convex" above, 

 and corresponilingly ciuica\e beneath ; nuuIjEUs 

 distinct, and placed towards the left postericu' angle 

 of the shell ; concentric lines of growth arcuate, 

 numerous, and distinct ; margins not broadly membranaceous, 

 breadth, \h mill. 



Intkkn.vi.i.v, the body is darkly idgnuinted ; the l-:iriNEY, he.vrt, and hjng- 

 C.WITV resemble those of A. nifj'csti-i; the .\(iKTA runs a consideraljle distance before 

 diviiling into tlie cejihalic ami visceral branches ; the 

 lateral sinuses, especially that of the left side, are 

 favourable fm- oljservation ; they can be seen through 

 the transparent skin to remain alnuist uniforndy 

 open without in tlie least answering to the jiulsa- 

 tions of the he.art, anil are thus strictly vemms ; the 

 supra-pedal glaml extends i|uite the length of the 

 body. The organ of Semper is oompo.sed of several 

 oblong lobules, easily detachable on account of the 

 tenderness of the skin ; the o,SPHR,\DlUM is indis- 

 tinctly ile\'eloped, but it can be traced to the middle of the lung chamber 



c» 



Vir.. 130.-Und.-reiile of the sul 

 oesophageal ganglia of .i. /irr'/, 

 showing the otocysts, \ 20. 



(Christchnrch, Hants S. ). 



Fio, 132. — I'enis laid 

 <;)pen to show the evcita- 

 tor-\- oi-gtm, :-: K (after 

 Simnith), 



Fm-;. 131. 



nans of ./. /„~',\, tti-eatlv enlarced (.iltrr Sininilh), „//.,-. .dlninicn qland ■ 

 n/, ovoleslis; ,.7'. oiidn. I ; ,1/.,,/. speriii dm I ; a/'- sputnialheea ; r. i-elr.naor; /„(. penis shc.ilh. 



Kn,, l33.-.\linientary can.-il ol ./. /,/r'/.(, sliouin^ li.e .ulhercnt sali\ary -l.nuls, s 3 l.ifter Siiniolhl. 

 Klc. 134. — Cephalic retractors of . J. /uti's-, 12. I.Vniik-y, Leeds). 



The itEl'lidliuCTlVK OKiiANS are very gelatinmis and deeply pigmented; the 

 (iviii'i':s4'ls is dark chestnut-brow 11, tuid aidriose; its iluct scarcely sinuous, mostly 

 dark, willi a piile \-KSlrll|,,\ SUMINAI.IS; .M.IiI'MEN lil..\Nli deep yellow ; (iVLSI'Eli- 

 MA'iDDiirr llnnly iiniti'il, whitish abo^■e, chestnut-brown benciit-h ; KiiKK o\'tIilun' 

 slc'il :ind gl;i,)idiil;it ; \-.\s I ifd'ERENs shorl , entering the iienis-shetith ne.-irlv Icrmin- 

 ally ; s1'KI;m,\ riif;c\ rlongtitely oval, llcsh-colonied, and atl.-tclicd to ovisprrmatodiict 



by M, distinct, iipical muscle; I'KNr.s-siiK.vni of .-i, peculiar h.ami --like form and 



darkly pigniciifeil, bill, occasionally in I'hirope, and invariably iii Amerii:a, is simidy 

 elongatr ; llir sub li.isal lateral protuberance contaius the .SAHOOIIEEUM, or excit;i- 



1 iMon..^, i., p I.-,, r. Kill. 



