﻿A N C Y L U S. 



Species G. (Fig. a, b, Mas. Brit.) 



Ancylus Janh. Ave. fostd ovatd, suboonii-il, alhd, 

 tftini.tar railiatiiii liratd, anfice aiigustiori ; njiirr 

 aciiinitiiito, ^)o.s-/('ct: suhmiinjiinili, latemliter sub- 

 rrntrali 



Janus's Ancylus. Sbell ovate, somewhat conical, 

 white, finely radiately ridged ; anteriorly nar- 

 rower, acuminated, posteriorly submarginal, 

 laterally subcontral. 



BOUIiC.UKINAT. Proc. Zool. Soc. LS.jo, p. 83. 



Uab. Italy. 



Species 7. (Fig. (7, h, Mus. Brit.) 

 Ancylus dupuanus. Am-. i,'si,! .<iihiJr^>,-i\-.y,l, oruh!, 



jKillide /aim, semli-ellnrhl,!. I.n-npil.l ; apirr 

 ohfiisn, hi feral iter siiUun;/;,,,,!:', /.,«/,Vt" jiaiilo. 



The tkansfauent Ancylus. Shell rather depressed, 

 ovate, pale fulvous, semi-pellucid, smooth ; apex 

 obtuse, laterally submarginal, posteriorly a little 

 ])ost-median. 



IIalheman. New Freshwater Shells. 



Eab. Ohio. 



Species 8. (Fig. a, h, Mus. Brit.) 



Ancylus Baconl Ah,\ l,'.<i,t i.nrr,!, u,;,t,'-nll.'„:j,l 

 de^re/isd, irans'hiei'l,!, lutciih, jmllnJ-- surrnn •! : 

 apice ohtiiso, latmiHtrr sulniifirfjiiiuli, ikkiUli'' 

 longe iwdmediano. 



Bacon's Ancylus. Shell small, ovate-oblong, de- 

 l)ressed, tran.'^lncid, shining, pale amber ; apes 

 obtuse, laterally submarginal, posteriorly far 

 behind the centre. 



Boueguignat. I'roe. Zool. Soc. 1853, p. 80. 



Hab. Bengal. 



Specie- :>. (Fig. a, h, Mus. Brit.) 

 Ancylus vitiu' i. Aue. feM litd, ilepresm, rotumid, 

 dwjiltai, \ '■ j'liird, jimpe manjiiiein eurinu, 



Jascii.-i I' ■ 'III-' cnrieijatis ; ajiicc nbtuso, 



versii.i iii'i '. i^teru-latiindem dedivi. 



The glassy Ancylus. Shell broad, depressed, rounded, 

 transparent, pale fulvous, horny near the 

 margin, variegated with blackish bands ; apes 

 obtuse, sloped towards the postero-lateral 

 margm. 



MoRELET. Proc. Zool. Soc. 1853, p. 88. 



Hab. Portugal. 



Species 10. (Fig. a, b, Mus. Brit.) 



Ancylus spina-kosyt;. Anc testd dextrali, pallidc 

 fidcd, Iwviijatd, profande calyculatd, ovatd, dorso 

 arciuito, elevato, apice uncinato, postice et laterali- 

 f.er subiiianjinali. 



The rose-thorn Ancylus. Shell dextral, pale fulvous, 

 smooth, deeply cup-shaped, ovate, back arched, 

 raised ; apes hooked, posteriorly and laterally 

 submarginal. 



Deapaknaud. Hist. Moll. PI. XIII. f. 10-12. 



AucyluH deperditus. Zeigler. 



Anculns gibbosus. Bourguignat. 



Hab. Germany. 



Species 11. (Mus. Brit.) 



Ancylus Deouetianus. Anc. testa conicd, subviridi, 

 Iii'viijntd, radiatim la'viter sulcatd, ovatd, postice. 

 ainjiistiuri, aiifiri: ainpld, manjiiic Jcriter mididatd, 

 „l>irc „,:„mi„„l,i, j,vsliee snbuiiirginuli, hileraliter 

 siiheeiitra'i. 



Deouet's Ancylus. Shell conical, greenish, smooth, 

 radiately slightly grooved, ovate, narrow pos- 

 teriorly, full anteriorly, margin slightly undu- 

 lating ; apes acuminated, posteriorly submar- 

 ginal, laterally subcentral. 



Bourguignat. Proc. Zool. Soc. 1853, PI. XX. f. 18- 



Hah. Teneriffe. 



Species 12. (Fig. a, b, Mus. Brit.) 

 Ancylus Deshayesianus. Ailc. testa conicd, breviier 

 ovatd, teiuii, pallide corned, opacd, Uvvigald, intus 



