﻿r L A N R B I S. 



Plate V. 



Species 35. (Fig. a, b, Mus. Brit.) 

 Planokbis siBiKicus. Pla. testa parvd, tuwuhi, drx- 

 Ird, rubesccnti-Ciinif'd ; spini planidafd , nnfnictihus 

 tribus ad qualmi,,.-!, Iniiiiili^, ,s-»/.n./»/«//.s- ,• dho 



valdr rnnrai 



,;.■„]; 



.fande 



ohti'do ; apeiiurd ohrtqu'c fidmnitd. 



The Sihekian Planoebis. Slii'll snmll, tumia, dex- 

 tral, reddish horn; spire fliitteiiL'd, whorls three 

 to four, tumid, rather round; lower disc very 

 concave, apical whorl deeply hidden; aperture 

 obliquely subovate. 



DuNKER. Proc. Zool. Soc. 1848, p. 42. 



Hab. Siberia. 



Species 36. (Fig. a, b, Mus. Brit.) 



Planokbis Stelzxeri. Pin. testa dextrd, lyallidUsime 

 fulvd, solidd, coiiiprfx.id, di>:eo superioy! coinplaiiato^ 

 inferiori ad iininjliu'Di ranrr.rd, ti'mi (tiiijiilati), 

 phuiulato, mrdin l„lr ,n„],!l!r„ln ; anfmetihils 



q„h,;.. .„p.r„r .:.„, ;i,.r„i;..s„pr., n>.dnnu.„h. 



aiiijiiliilisj,),,, ,T,x",-- r,,lin,n'lhiiii. iiirJiiiatif; aper- 

 tiird ..Idniid- ,„J,o,;,ld. 



Stelznek's PLANdliiii?. Shell dextrul, very pale ful- 

 vous, solid, compressed; upper disc flattened, 

 lower convex at the margin, then angular, flat- 

 tened, broadly umbilicated in the middle ; whorls 

 five, rather convex above, subangular above the 

 middle, then sloped inwards towards the colu- 

 mella ; aperture obliquely subovate. 



DOHRN. Proc. Zool. Soc. 1858. 



Hah. Ceylon. 



Species 37. (Fig. a, h, Mus. Brit.) 

 Pl.\N0RI1IS Gir,i:Kl:Tl. Fhi. fcstd siil/nmiprcssd, de.e- 

 trali, tnnii, frrr uU.d : spi,-.: p„nu} : „„fr„rtlhus 

 trlhii,; idlniio wn.junjin,,;,!,,. ,iiprn,r .■<„h,:»„!co, 

 uifra mrdiiun uhhisr ,ui.j„l„h,; f/Z.-r,. luferhrri 

 phnnd.,/,., ,nub<licch,: apaiurd a.^usld^ h,/ra 

 m.-din.n „wjiilatd. 

 GiLBEin's Plaxokius. Shell subcompressed, dextral, 

 thin, almost white; spire small; whorls three, 



last large, tumid, rather conical above, obtusely 

 angular below the middle; lower disc flattened, 

 umbilicated ; aperture narrow, angular below 

 the middle. 



DuNKKii. Proc. Zool. Soc. 1848, 40. 



Eab. Kast Australia. 



Species 38. (Fig a, h. r, Mi 

 Planokbis ebdeneus. Fhi. t'std. ullu 



httd. br,-;. albd, mrdin n„fr«rtH,u 

 at.!; apirr j,arr.,,a.f.;,r};i.„s/rH 

 2daH„lai;^, l,n„ drrl. 

 viaijwt, ((//<>, ntpiili (■ 

 auj 



ill II: 



vexu, 



,i; 



rivx, 



Brit.) 



',ii„;dd. 



iiijhdd. 



SIIJIi 



diirld. 



The ivory Planorihs. Shell high, tumid, undulating, 

 smooth, white, banded with chestnut in the 

 middle of the whorls ; apex small, whorls three, 

 nither flattened above, then sloped, inflated 

 below ; last large, high, rapidly increased ; lower 

 disc convex, apical whorl hidden ; aperture large, 

 flexuously depressed above, inflated below, pro- 

 duced. 



Gray- y MS. Mus. Brit. 



Uab. Ceylon. 



Species 39. (Fig. a, b, Mus. Brit.) 

 Planorbis OBTUSUS. ria. testa cumjiressd, sitbrmju.id, 

 fernigitied, apice lata, pkmiulula ; aiifnirtibun qui- 

 7i!s, lente cyescentibus, conn .i-ii'i.<riili'.-;. miprnie sub- 

 dedivihus, hfrd obtuse aii'inlali's, infra aiujiduiii. 

 pbii,!dat!.<: ajMiiiirdohJIqid sid.umtd, iiijni obtuse 



The ORiiSE Pi,AN(jia;is. Shell compressed, rather 

 rough, ferruginous, apex broad, flattened ; whorls 

 five, slowly increased, rather convex ; rather 

 sloped above, obtusely angular below, flattened 

 below the angle ; aperture obliquely subovate, 

 obtusely angular below. 



Deshayes. Proc. Zool. Soc. 



Hab. Adelaide. 



