﻿A N C Y L U S. 



huge post-mediano. 

 The nakeowed Ancylus. Shell dull brown, coniciil, 



narrow, elongated, smooth, with compnsscd 



sides, inside blaeish pink, back elevated, ajics 



arched, placed far backwards. 



JIooRE ? MS. Mus. Brit. 



Uab. ? 



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



AncTLUS B.\RILENSIS. A»C. te.<td ilrjirr.-.:<i!, chliiii.j,/, 

 angusfd, castaned, lamgatd, inh''^ riimsii : i/o/A) 

 dcrjivi ; apice acumiiMti>,2)0sti''-r 1 1 JuUrahi'-r sid>- 

 marfjinnli. 



B.uuLls AxcTLCS. Shell dcjiressed, oblong, narrow, 

 chestnut, smooth, vinous witliin ; back sloped : 

 apex acuminated, jiostcrioi-ly and laterally sub- 

 marginal. 



:Moi!ICanii. Coq. Tev. et Fluv. Bahia. 



lid). Brazil. 



Species 17. (ilns. Brit.) 



Ancylus Kootanexsis. Anc. fesld hr, 

 rolundd, depressd, corneo-ruhesi-euli : 

 stilcenindi, frequenter nitjresceidi. 



The Kootan Ancylus. Shell short, 1 

 round, depressed, reddish horn ; 

 subcentral, often black. 



Baiep. Proc. Zool. Soc. 18G3, p. 09. 



Hah. River Oregon. 



(Mus. Brit.) 



lie. te!<td compref 



./»-■;,/,;, /„r///,/;,s.v 



,,„sf,rr rt lafr 



Ohio 



ditr 



Species 18, 

 Ancylus rAiiALUELrs. A 



suhrecf<hif.,:,l,\ fmi. 

 dorso ilt-rliri, npirr 



centralL 

 The PARALLEL Ancylus. Shell compressed, oblong, 



rather straight-sided, transparent, very pale horn ; 



back sloped, apex posteriorly and laterally 



subcentral. 

 Haldemax. Mon. Freshwater. Sh. Proc. Zool. Soc. 



1853, 8-1. 

 Hah. New Orleans. 



^i)ecie; 



■XCEXTinCl 



,s-«./c-/.s- :„r 



19. (ilus. Brit.) 

 i. Ane.testd olivaceo-corned, 

 oispicui.'t iiudulatis radiatii, 



The coxi'KNTiai; An'cylus. Shell olive-horn, rather 

 conical, rayed with iiidistinctundulating grooves, 

 with coiicoatric lines, oblong, posteriorly nar- 

 rowed, anteriorly subexpanded ; back raised to- 

 wards apex ; apex acuminated, hooked, ap- 

 proaching the imstero-lateral margin. 



D'Oiir.iiiXY. V(iy. Amer. Merid. t. v. p. 354. 



Hah. Montevideo. 



pecie 



AXCYLOS 



de.rlrai; rr.-tiin 



po.flrn Sllhrrilliil.i. 



The sriiiNKLEi) Ancylus. Shell elongated, narrow, 

 compressed, sprinkled with little blackish spots, 

 left side rather straight; apex rather lateral, 

 rather remote from the posterior margin. 



GuiLDiNG. Proc. Zool. Soc. 1853. 



Hab. Antilles. 



Species 21. (Mus. Brit.) 



AxcYLUS CniTTVi. A)ii'. tcftil i/riseo-fuscd, ohli 



priifiiiiilr ralijfidiit,!, >iiil,nratd,, antice subacumi- 

 ihlit/iir an-inifn ; apiice (jihboso, exirci 



"IK" 



ui,;ii.pa..t. 



iqlir 

 -latr 



dual 



'ducto. 



Chitty's Ancylus. Shell grey-brown, oblique, deeply 

 cup-shaped, subovate, anteriorly subacuminated ; 

 back obliquely arched, apex gibbous, produced 

 beyond the postero-lateral margin. 



Ad.«s. (C. B.) ? 



Hah. Jamaica. 



ipecii 



(Mus. Brit.) 



Ancylus SiiUKHTS. Am-. frst,l dr.rtrali. ohliqid- nmh-d, 

 fali-d, oralil,liiliis alh,! : dor.-'O alio, ohUipm, a^.in- 

 edra-iiiarrjinali, obtiisiiisculo. 



The SiBiR Ancylus. Sliell dextral, obliquely conical, 

 fulvous, ovate, white within ; back high, oblique, 

 apex extra-marginal, rather obtuse. 



Geesfeldt. Moll. Sibur. et Amur. 



Eab. Sibir. 



