246 LIMNAEACEA. 



Sub-Genus SE&MENTINA, Fleming. 



42. Planorbis (Segmentina) swinhoei, H. Ad, 



1 Formosa ; ex c. H. Adams, Esq. 



43. Planorbis (Segmentina) cantori, Benson. 



22 Galle and Balapiti, Ceylon ; coll. H. F. Blanford, Esq., and G. Nevill, Esq. 

 1 Jamalpur ; ex c. Dr. F. Stx)liczka. 



44. Planorbis (Segmentina) trochoides, Benson, 



6 Belgaum; coll. W. T. Blanford, Esq. 



9 Barrackpore (typical) ; coll. Cantor, ex c. As. Soc., Bengal. 



8 Balapiti, Ceylon, and Madras ; coll. G. Nevill, Esq. 



1 Port Canning; coll. G. Nevill, Esq. 



45. Planorbis (Segmentina) umbilicalis, Benson. 



2 Sylhet; ex c. As. Soc., Bengal. 

 20 Assam ; ex c. Dr. T. Oldham. 



46. Planorbis (Segmentina) coenosus, Benson. 



1 Manbhoom ; coll. V. Ball, Esq. 



47. Planorbis (Segmentina) calathus, Benson, 



15 Manbhoom; coll. V. Ball, Esq. 



5 Moradabad (typical) ; coll. BenSon, ex c. As. Soc., Bengal. 



1 Chandernagore ; coll. Colonel G. B. Mainwaring* 

 10 Assam ; ex c. Dr. T. Oldham. 



1 Ava ; coll. Dr. J. Anderson. 



48. Planorbis (Segmentina) nitidus, Miiller, 



9 England, Germany, and France ; coll. G. Nevill, Esq. 

 15 Yarkand ; coll. Dr. F. Stoliczka. 



49. Planorbis (Segmentina), sp. 



(? P. CalathllS, var.) 



2 China; ex Damon. 



50. Planorbis (Segmentina) hemispherula, Bens. 



2 Chusan (typical) ; coll. Dr. Cantor, ex Damon. 



Sub-Genus BA THYOMPHALUS, Agassiz. 

 (Spirorbis, Swain. = fide Carus and Gerst.) 



51. Planorbis (Bathyomphalus) contortus, Linn, 



11 England; coll. G. Nevill, Esq. 



