﻿PLANORBIS.— Plate IV. 



Species 30. (Fig. 1, a, h, Mus. Hanley.) 



Planorbis calathus. Pla. testa parvd,dexf.rali,nitenti, 

 succined, interne sogmentatd, extus fasciis albin 

 obliqvr ritdiatitthiif oriiatd, superne convexd, infra 

 plamilijl'l, si'i,-'! r.ihl!' cmitractd; anfractibus tri- 

 bus, ultimo iitajiio, suhconico, infra acute angulato, 

 ancjuste umbilicato. 



The basket Planorbis. Shell small, desti-al, shining, 

 amber, divided by segments within, ornamented 

 without by white rayed bands, convex above, 

 flattened below ; spire much contracted, whorls 

 three ; last large, somewhat conical, acutely an- 

 giilar, narrowly umbilicated. 



Benson. Aun. Nat. Hist. Ser. 2, Vol. V. (18.50), p. 

 849. 



Eab. Moradabad, Kattiawar, Ceylon, Cashmere. 

 Belonging to the ' Segmentina' group. 



Species 31. (Mus. Hanley.) 



Planorbis exustus. Pla. testa suhviridi, fusco, tenu- 

 iter liratd, spird subplanulatd, anfractibus tribus, 

 ultimo maximo, aperturd superne subangnlaiim 

 elevato, turn depresso, declivi, infra expansd, suh- 

 productd, disco inferiuri late concavo. 



The bdent Planorbis. Shell greenish brown, finely 

 ridged ; spire rather flattened ; whorls three, last 

 lai-ge ; aperture angularly raised, then depressed, 

 sloped, expanded below, rather produced ; lower 

 disc broadly concave. 



Deshates. Belanger's Voj-age. Ind. Ori. Zool. p. 

 417. 



Planorbis Indicus. Benson. 



This appears quite distinct from Planorbis coro- 



mandelieiis in form and surface. 



Species 32. (Fig. a, b, Mus. ? Copied.) 



Planorbis Natalis. Pla. compressd, fumoso-fuscd ; 

 spird subplanulatd, anfractibus quaternis,rotundis ; 

 ultimo lata, medio prominenii ; disco inferiori late 

 concavo; aperturd cowprcssd, lateraliter elon- 

 (jatd. 



The Natal Planorbis. Shell smoky brown; spire 

 rather flat, whorls four, rounded ; last broad, 

 prominent in the middle ; lower disc broadly 

 concave, aperture compressed, laterally elon- 

 gated. 



Krauss. Sudafrikanischen Mollusken. Tab. V. f. 9. 



Hab. Cape Natal, S. Africa. 



Species 33. (Mus. ? Copied.) 



Planorbis Pfeifferi. Pla. testd olivaced, Iwvi, sub- 

 compressd; spird subcoinplanatd, anfractibus tu- 

 ^nidis, rotundis, superne convexinseulis, infra an- 

 gusfatis ; aprrtiird mtiuide subquadratd ; disco 

 inferiori an'j'isti h nihil ii-'ito. 



Pfeiffer's Plamji^iis. Sliell olive, smooth, rather 

 compressed ; spire rather flattened, whorls tu- 

 mid, rounded, convex above, narrow below ; 

 aperture roundly subquadrate ; lower disc nar- 

 rowly umbilicated. 



Krauss. Sudafrikanischen Mollusken. Tab. V. f. 33. 



Hab. Cape Natal, South Africa. 



Species 34. (Mus. Brit.) 



Planorbis Coromandelicos. Pla. t'si,; ,ili,;. mstaneo- 

 cornet'i, tenui,la'vigatd.irrrijnl:in'Ur niululd ; spird 

 rnntractd, concavd; anfraclihus ipoiterni^, supra 

 siduram angulatim, elevaiis, perpendiculariter sub- 

 complanatis ; ultimo magna, ad aperturam ex- 

 pi I II sn ; aprrtu rd supra suturam elevato, turn declivi, 

 infri'i uliliijii,'' r.rjHvnsd, producid ; disco inferiori 

 conriir.i. unfrartihus rotundis, apicali obtecto. 



The Coromandel Planorbis. Shell high, chestnut- 

 horny, smooth, irregularly undated ; spire con- 

 tracted, concave ; whorls four, angularly raised 

 aliove the suture, perpendicularly flattened, last 

 large, expanded towards the aperture ; aperture 

 raised above the suture, then sloped, obliquely 

 expanded, produced ; lower disc concave, whorls 

 rounded, apical one hidden. 



KCster, as of Fabricius. 



ILitb. Co. of Coromandel. 



