﻿CYLIXDRELLA.— Plate V. 



Species 42. (Mus. Brit.) 



Cyhn-urella MicaosTOMA. Cijl. testa subperforatd, 

 pupafoi-mi, cretacea ; suprd medium injlata, hide 

 versus ultimum anfraclum gradatim alteimald ; 

 anfractibus angustis, rmmerosis, vltinto contracto, 

 infrd excavato ; apertun'i pari-a, verticali, sub- 

 trigond. 



The SMALL-.MOUTHED Cylindrella. Shell slightly 

 perforated, pupa-shaped, chalky ; inflated above 

 the middle, thence gradually attenuated towards 

 the last whorl ; whorls narrow, numerous, the last 

 contracted, excavated below; aperture small, 

 vertical, subtrigonal. 



Pkeiffer. Proc. Zool. Soc. 18C1, p. 27. 



Hab. ? 



A curious little pup»forra shell, which has the greatest 



inflation above the middle of its length. 



Species 43. (Mus. Brit.) 



CtLiNDRELLA Agnesiana. Cyl. testd elongatd, ci/lin- 

 dricd, angiistd, albidd, tenuiier striata; anfracti- 

 bus 18, sinistrorsis, convexiusculis ; ultimo recto, 

 iufi'd carinato, infrd carinam excavato, versiis 

 aperturam longe soluto, bicarinato, valde deflexo, 

 nperturd remota, oblique subquadratd, margine 

 interno rotundo, labio externo biangulato. 



The Agnesian Cylindrella. Shell elongated, cylin- 

 drical, narrow, whitish, finely striated; whorls 

 eighteen, sinistral, rather convex ; tlie last straight, 

 keeled below, excavated below the keel, uncoiled 

 some length towards the aperture, much bent 

 downwards ; aperture remote, obliquely sub- 

 (|uadrate, inner margin round, outer lip bi- 

 angular. 



Adams, C. B. Chom. p. 38. 

 Hub. Jamaica. 



A graceful white shell. 



rotundato, latcraliter soluto ; aperturd subrotundd, 

 subremotd, margiiie crassiusculo, rotundo. 



The Mountain Cvlinhrella. Shell short, rather 

 straight, pink, finely striated ; last whorl narrow, 

 rounded, laterally uncoiled; aperture rather 

 round, rather distant, margin rather tliick, round. 



C. B. Adams. Chem. p. 29. 



Cf/lindrella rosea, var., Pfeiffer. 



Hab. Jamaica. 



Species 4;j. (Mus. Brit.) 



Cylindrella teres. Ci/l. testa crassidsculd, Icevigatd, 

 subpyramidntd, albd, superne fused, attenuatd ; 

 anfractibus coarcriilsculis, ultimo paulo angustato, 

 infra sidirariuatv, infrd carinam excavato ; aper- 

 turd pro.rimd magnd, subrotundd ; cohunelld 

 superne subcaUosd. 



Tjie taper Cylindrella. Shell rather thick, smooth, 

 rather pyramidal, white ; brown above, attenuated ; 

 whorls rather convex, the last a little narrowed, 

 slightly keeled beneath, hollowed beneath the 

 keel; aperture approximate, large, rather rounded; 

 columella with a slight callosity above. 



Menke. (Ilolospira) Chem. p. 5G. 



Hab. Cuba. 



Species 44. (Mus. Brit.) 

 MDRELLA MoNTANA. Ci/l. testd brevi, recti4sadd, 

 rosed, tenuiter stiiatd ; ultimo anfractu angustato, 



Species 4(.;. (Mus. Brit.) 



Cylindrella .semintda. O//. testd parvd, gradato- 

 turritd, jni/ia/nniii : unfraclibus scalariformibus 

 supterne miguhiiis : ad unguium prominent'e 

 noduloso-sguamatis ; ultimo infrd angustato, latera- 

 liter longe soluto; aperturd remotd, latere colu- 

 mellari rotunda, latere extcrnn angidatim acvmi- 

 iiato. 



The hale-nude Cylindrella. Siiell small, pu]ia- 

 shaped ; whorls angular above, prominently 

 nodosely squamose at the angle ; the last 

 narrowed below, laterally much \incoiled ; aper- 

 ture remote, rounded on the coluniellar side, 

 angularly acuminated at the inner side. 



