﻿r L A N R B I 8. 



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



Flanoubis Hindsianus. Pla. tesid parvd, dextraU, 

 compressd, pallide suerAned, supeme convexd, infra 

 concavd, Itevi ; spird parvd, anfradihus trihua, 

 duobus apicalibus angustis, ultimo lata, rnpidi' 

 crescenti; aperturd lata, perobliqud. 



Hinds' Planorbis. Shell small, dextral, compressed, 

 pale amber, convex above, concave below,smootli, 

 spire small, whorls three, two apical narrow, last 

 broad, rapidly enlarged ; apertm-e broad, very 

 oblique. 



DuNKEU. Proc. Zool. Soc. 18-18, p. 41. 



Hab. Pnna Islands. 



Species 4.5. (Fig. a, h, ilus. Brit.) 



Planorbis CATlLLUS. Pla. tesid wtrinqiie compressd, 

 piirvd, alba, dextrali ; spird compressd, anfracti- 

 biis quinig, amjustis, Icniii cresceiitibus, infra an- 

 (jnlatis; aperturd oblique subovatd, angustiusctdd, 

 a iitiee product d, manjlne inferiori subangulatd. , 



The litile bish Planokbis. Shell compressed on 

 both sides, small,white, dextral, spire compressed, 

 whorls five, narrow, slowly increased, angular 

 below ; aperture obliquely subovate, rather nar- 

 row, anteriorly produced, lower margin rather 

 angular. 



Anton. r Adams. Genera of Mollusca. 



Eab. ? 



Species 4(1. (Fig. a, h, Mus. Brit.) 

 Planorbis Salleanus. Pla. testa ttmidd, dextrali, 

 ferrugined, la;fiiisci(ld ; spird, subcompressd, an- 

 gustd; anfractibus quaternis, altis, supeme angus- 

 tatis, infra medium inflaiis ; aperturd suboblique 

 ovatd, antice subexpaiisd ; disco inferiori lata, urn- 

 bilicato. 

 Salle's Planorbis. Shell tumid, dextral, fen-ugi- 

 nous, rather smooth ; spire rather compressed, 

 narrow ; whorls four, raised, nan-ow above, in- 

 flated below the middle; apertui'e rather obliquely 



ovate ; anteriorly rather expanded ; lower disc 



broadly umbilicated. 

 Dunker. Proc. Zool. Soc. 1853, p. .'i4. 

 Hab. St. Domintjo. 



Species 47. (Fig. a, b, Mus. Brit.) 



Planorbis inflatus. Pla. testa magnd, robustd, alia, 

 la'vigatd, pallide olivaced, infra medium iniusqtie 

 castaned ; spird parvd, profundi; concavd ; anfrac- 

 tibus quaternis, apicalibus tribus parin's, ultimo 

 alti.-<.'>-imo,SHi,r<i suturam per,-lrnitn, ,-„/««J,., iifra 

 medium ,H,n,ls i„jl,tt„: dis.-o in/mnri cu„v.,rn, 

 anfractn aplcali nbtecto; npeiiiird xidi'in njonni. 

 altd, margine inferiori sid>e.rpanso. 



The inflated Planorbis. Shell large, robust, high, 

 smooth, pale olive, chestnut below the middle 

 and within ; spire small, deeply concave ; whorls 

 four, three apical small, last very high, much 

 raised above the middle, round, more inflated 

 below the middle ; lower disc concave, apical 

 whorl hidden ; aperture rather ear-shaped, lower 

 margin a little expanded. 



Dunker. Proc. Zool. Soc. 1848, p. 40. 



Eab. ? 



Species 48. (Fig. a, b, Mus. Brit.) 

 Planorbis riRcuMLiNEATus. Pla. tcstd succined, s?<6- 



prlhirid.;, I.i.ui.husndd. dr.,lr„i;. hrri : sju'ra 

 p.rr.i .n.,r..;,h,.. ,/.„/,,-„;., r.,i>i,lr rrrsr,„til.„s, 

 ullu,,.l.,t...j.r..i.e„^.rri„rn,„.„l„,rj.„„so,„j,rrtnrd 

 oblique subucatd, anjustiilsculd, infra paidb ex- 

 pansd. 



The circdmlinear Planorbis. Shell amber, rather 

 pellucid, rather tumid, dextral, smooth ; spire 

 small, whorls four, rapidly increasing, last broad, 

 a little expanded near the aperture ; aperture 

 obliquely subovate, rather narrow ; a little ex- 

 panded below. 



Shuttleworth. ? MS. Mus. Brit. 



Hab. Porto Rico. 



