120 



236. Planorbis (Gyraulus) sivalensis (Hutton). 



Planorbis (Gyraulus} sivalensis (Hutt'on, MS.), Clessin, in Couch. - 

 Cab. 1884, p. 194, pi. 28, fig. 9. 



Original desertion : Testa minuta, compressa, solid ula, pallide- 

 cornea, subtilissiine striata, nitidula; supra centre immerso, 

 infra concava; anfr. 3|-4, lente et regulariter accrescentes, 

 superne convexiusculi, sutura profunda separati, inferne sub- 

 planulata ; ultimus infra obtuse angulatus, penultirao vix duplo 

 latior ; apertura ovata, perobliqua ; peristoma acutum, marginibus, 

 x-allo tenuissimo conjunctis. 



Alt. 1*2, diam. 4'5 mm. 



Hab. N. India, Dehra Dun (Benson). 



237. Planorbis (Gyraulus) hohenackeri (Clessin). 



Planorbis (Gyraulus) hohenackeri, Clessin, in Concb.-Cab. 1884, 

 p. 205, pi. 31, fig. 7. 



Original description: Testa solidula, diaphana. leviter et 

 regulariler costulata, fulvo-cornea, supra profundissime perforata, 

 infra parum concava ; anfr. 3| celerrime accrescentes, teretes, 

 utrinque sutura profunda separati ; ultimus ^ ornnis diametri 

 superans, ad aperturam breve descendens ; apertura lunata, 

 rectum ; peristoma acutum, fusco-labiatum ; marginibus callo 

 Jbenui juoctis. 



Alt. 4-5, diam. 9 mm. 



Hab. Himalayas. 



238. Planorbis (Gyraulus) huttoni (Benson). 



Planorbis (Gyraulus) huttoni (Benson, MS.), Clessin, in Conch.- 

 Cab. 1884, p. 139, pi. 18, fig. 4. 



Original descriptions Testa parvula, depressa, tenuis, trans- 

 verse striata, pallide-cornea, supra plana centro immerso, subtus 

 modice umbilicata ; anfr. 3^, celerrime accrescentes, ovato- 

 depressi, sutura profunda separati, ultimus valde dilatatus, 

 penultimo triple latior ; aperturam versus paululum descendens ; 

 apertura ampla, valde obliqua ; peristoma acutum, margine 

 superiore producto. 



Alt. 1, diam. 5'5 mm. 



Hab. Calcutta; Benares. 



239. Planorbis (Gyraulus) barrackporensis (Clessin). 



Planorbis (Gyraulus] barrackporcnsis, Clessin, Conch. -Cab. 1884, 

 p. 125, pi. 18, fig. 7. 



Original description : Testa depressa, supra paulo con- 

 vexiuscula, centro immerso; infra umbilicata; subtiliter striatula, 

 diaphana, tennis, paulo nitidula, pallide-cornea ; anfr. 3|, ovato- 

 rotundati, utrinque aequaliter convexiusculi, angulati; celerrime 



