I'LANOniJI.S. 117 



picta, nitida denseque striata, liaud pellucida, supera facie 

 plauiuscula, in medio i)rofuiide umbilicata, iiiferne concava ; 

 anfr. 3=1-4 tumidis, rotiuulatis intra prope suturam profundani 

 snbangulatis ; apertura reniforini pei-parum obliqua : labro tenui 

 fusc-o vel castaneo ; lamella in pariete aperturali tenuissima. 



Heisi;lit G-25, (greatest diameter lG-25 mm. 



Hah. Poiidic'lierr}' and the Coast of Coromandel. 



A very doubtful species. 



229. Planorbis hindu, Clessin. 



Flaiiorhix Jiindti, Clessin, Concli.-Cab. 188o, p. 224, pi. 3:5, iig. U. 



Ongiaal description : — Testa discoidea, depressa, leviter regulari- 

 terque striata, albidula, diapliana, nitida ; supra infundibuliforme 

 concava, infra concava ; anfr. 4, modice celeriter accrescentes, 

 depresso-rotundati, utrinque siitura modice profunda separati, 

 inferne ad suturam vix obtuse angulati ; ultiraus amplus, 

 penultimo duplo latior ; apertura perobliqua, late-lunata ; 

 peristoma acutum, marginibus callo tenui conjunctis ; margine 

 superiore valde arcuate producto. 



Alt. 4, diara. 11 mm. 



Hah. India. 



230. Planorbis orientalis, Lamnrcl-. 



Planorbis orientalis, Lamarck, Anim. s. Vert, vi [2], p. 153; 

 Sowevby, in Reeve, Conch. Icon. xx. pi. 11, sp. 8!); Clessin, in 

 Conch.-Cab. 1885, p. 227. 



Original description : — PI. testa discoiden, utrinque plano- 

 depressa, subrugosa, fragili, cornea ; ultimo anfractu subangulato. 



Shell thin, irregularly undulated, yello\visb-\\ bite, sinistral : 

 spire narrow depressed; whorls a little raised above the suture ; 

 last broad, sloped, expanded towards the aperture ; aperture com- 

 pressed above and below, large, obliquely deflected ; margin 

 sinuous ; lower disc concave. 



Lamarck in bis original, though scanty, description, gives the 

 diameter of the shell as 4 lines (= 9 mm.). 



231. Planorbis modicus, Benson. 



Planorbis inodicus, Benson, Ad&ms Geneva, ii, 1858, p. 261 ; Sowerby, 

 in Reeve, Couch. Icon, xx, pi. 9, sp. 7(1 



Shell horny, tumid, spire funnel-shaped ; whorls 5, raised and 

 angular near the suture, last broad, sloped, concentrically iiuely 

 wrinkled : aperture subtrigonal, lower disc concave, whorls 

 rather flat. 



Diam. mai. 19-75, diam. min. 1(>'25 mm. 



Hah. India. 



