PLANOUBIS. 



121 



accrescentes ; ultimus penultiino fere lertio latior ; apevtura valde 

 obliqua, ovata ; peristoma acutuui, niargine superiore valde 

 prodiu-to, arcuato. 



Alt. 1-2, diani. 4 uiiii. 



Hal). IJarrackpore. 



240. Planorbis (Gyraulus) himalayanus (/hdton). 



Planorhis (Gi/raulm) /limnlayatitis (Iluttoii, MS.), Clessiii, Couch. - 

 Cab. 1884, p. 141, ])1. -20, tig. 8. 



Orvjinal dm-rlpiioa: — Testa depressa, solidula, nitidula, 

 pellucida, arcuate striata ; supra plauulata centro concavo ; sublus 

 paulujnm concava ; anfr. 4, uiodice celeriter accrescentes, depresso- 

 ovati, sutura leviter immersa separati, in peripheriam I'ere 

 ■anguiati, utrinque iequaliter convexiusculi ; ulliinus penult iinu 

 duplo latior; apertura perobliqua, ovata ; peristoma acutum, 

 marginibiis disjiuictis, margine superiore arcuata producto, 

 inferiore fere recto. 



Alt. 1-2, diam. 5-5 mm. 



Bah. Tinjori Valley, 



241. Planorbis (Gyraulus) liratus, ]Vesterlund. 



Planorhis {Gyraulus) liratus, Westeiiund. in Vega Exped. Vetens- 

 kapliga Jakttagelser, iv, p. 206, pi. 4, tig. 18. 



Orir/inal description : — Testa parva, plana, utrincpie centro 

 subiequaliter impressa, lutescenti-cornea, supra et infra, ab apice 

 ad apei-turam sub lente perdistincte spiraliter lineata, transversim 

 vix striatula ; aufr. 4, couvexi, regulariter accrescentes, ultimus 

 lente accrescens, subcylindraceus, basi perobsolete angulatus, supra 

 paullo magis convexus ; apertura rotundata. 



Alt. 1, diam. 2"5 mm. 



Hah. I'oint do Gralle, Ceylon. 



242. Planorbis (Gyraulus) demissus, Westerlund. 



Planorhis {(ri/raulus) demissus, Westerlund, in Vega Exped. Vetens- 

 kapliga Jakttagelser, iv, p. 204, pi. 4, tig. 16. 



Original description:— TeaUi depressa, utrinque centro impressa 

 (supra magis), striatula, sculptura spiral! nulla, angulo peripberico 

 distinct©, juvenis cornea, nitidula, matura alba, opaca ; anfr. 4|, 

 celeriter sed saepius (prtesertim subtus) irregulariter accrescentes, 

 utrinque magis magisque centrum versus demissi, ultimus dilatatus, 

 medio angulatus, utrinque subanjualiter convexiusculus, antice 

 paullo descendens : sutura sat profunda ; apertura perobliqua, 

 intus semper nitida, ovata, extus acutiuscula, marginibus callo 

 elato in pariete contiguis, interiore leviter curvato, exteriore forte 

 arcuato. 



Alt. l-T), diam. maj. 6, diam. min. i) mm. 



Hah. Point de Galle, Cevlon. 



