﻿PLANORBIS.— Plate XI. 



Spocies 90. (Mus. Brit.) 



Planorris stkamiseus. T'la. feKti' ttimiiH 

 de.rlr„i;, .ton,,;,/,',; : -<,.',:! r,i,„,,]„„„l,;. 



,-t;i,, 



'"I" 



.InuiJntk, 



deprrxg, 



medio rriitrn-ns;^, n,/,,) rn1 ii ndi^ ; dis,;, injWwri 



e.ixnvato, anfradu apicali obtecto. 



The straw-coloured Planorbis Shell tumid, de- 

 pressed, destral, straw-coloured ; spire flattened, 

 middle rather depressed, whorls four, flattened 

 above, ventricose in the middle, rounded below ; 

 lower disc excavated, apical whorl hidden. 



DuNKER. Proc. Zool. Soc. 1848, p. 4.2. 



Hah. ? 



Species 91. (Mus. Brit.) 



Planorbis glabeatus. Pla. testa siuistrali, judro- 

 corned, tumidd, siibdejyressd, Iwingatd ; sjurii (in- 

 iJUStd, depressd, inijrdi-lihiis (tnijii.si: .~:iij,ni suhiniiii 



elevatis ; idtium lil:' 



■ d„d: 



magna, maryiin injr, 



„„'d;o excvrito. 

 The polished Planorbis. Shell sinistral, fulvous- 



horuy, tumid, somewhat depressed, smooth ; 



spire narrow, depressed ; whorls narrowly raised 



above the suture ; last broad, sloped above ; 



aperture large, lower margin produced, and lower 



disc hollowed in the middle. 

 Sat. Adams' Genera of Mollusca. 

 Hab. Florida. 



Species 92. (Pig. o, b, Mus. Sowerby.) 

 Planorbis Antiguensis. Pla. testa lata, comjrressd, 

 kevigatd, fasco-corned, sinistrali ; spird depressd. 

 anfractib-us quinis, eompressis, roiundis, prope 

 marginem supra suturam elevatis, rapide crescen- 

 tibus ; ultimo latiusculo; aperturd magna, elevatd, 

 subtrigond ; disco inferiori concavo. 

 The Antigua Planorbis. Shell broad, compressed, 

 smooth, brown-horny, sinistral ; spire depressed, 

 whorls five, compressed, rounded, raised near 



the margin above the suture, quickly increased ; 

 last broad ; aperture large, raised, rather trigo- 

 nal ; lower disc concave. 



GUILDING. ? 



Eab. Antigua, West Indies. 



Species 93. (Fig. a, b, Mus. Hanley.) 



Planorbis coirvEXitscnLDS. Pla. testa subcomplanatd, 

 alba, tumidiusould, Icevigatd, dextrali ; anfracti- 

 has qiiaternis, rapide cresceniibus ; ultimo lata, 

 versus aperturam expanso ; aperturd oblique sub- 

 ovatd, supra uUimum anfractum elevato ; disco in- 

 feriori excavato. 



The kathek convex Planorbis. Shell rather flat- 

 tened, white, rather tumid, smooth, dextral ; 

 whorls four, rapidly increased; last broad, ex- 

 panded towards the aperture ; aperture obliquely 

 subovate, raised above the last whorl ; lower 

 disc excavated. 



HuTTON. Journ. Asiat. Soc. Beng. 1849, Vol. XVIII. 

 p. 052. 



ILdj. Aii'ghauistan. 



Species 94. (Fig. a, b, Mus. Sowerby.) 

 Planorbis exacutus. Pla. testa depressd, fusco-corned, 

 dextrali, supeme convexd, inferne planiiisculd, 

 pauUi infra medium acute carinaid; aperturd 

 compresfd, lateraliter obliq-ne elongatd, maryine 

 cjii I" r/.- :.;/.(' ; disco inferiori subcomplanatd. 



The!-uai;i I'ianmiiis. Shell depressed, brown-homy, 

 dextral, convex above, rather flat below, sharply 

 keeled a little below the middle ; aperture com. 

 pressed, laterally obliquely elongated, outer 

 margin acuminated ; lower disc rather flat, 

 umbilicated in the middle. 



Say. Journ. Amer. Journ. Soc. Phil. 



Planorbis Indicus. Benson. 



Bab. United States. 



