3 PALUDINIDJ;. 



Subfamily BENEDICTIINJE, Dybowski. 



Von Martens and Clessin consider this subfamily as form- 

 ing part of the Rissoidce. Despite the characters of the oper- 

 eulum, I can scarcely believe this classification will prove correct. 



Genus BENEDICTIA, DylowsU. 

 Mem. Ac. Peter sb. XXII, 1875, type B.fragilis, Dyb. 



1. Benedictia baikalensis. 



Paludina Baikalensis, Gerstfeldt, Mem. Ac. Peter sb. IX, 1859, LaTce Baikal. 

 1 Lake Baikal; ex Mr. R. Damon. 



Subfamily BYTHINIINufl, Troschel (emend.). 



Considered by Stimpson and Clessin as a subfamily of the 

 Rissoidce. 



Genus BYTHINIA, Leach, Ms. 



Gray, Medic. Bepos. XV, 1821 [_sine descr.~\ ; = BytUnia, Risso, 1826 ; 

 fide Clessin, " BytUnia," Gray, PJiilos. Mag. Vol. 63, p. 274, type Helix 

 tentaculata, Lin. / fide Martens, " Bithinia" of Fam. Paludinidce. 



l. Bythinia oerameopoma. 



Paludina sp. ? , Benson, Gleanings Science, Calcutta, Vol. I, p. 363, and 

 Vol. II, 1830, p. 125, as Paludina cerameopoma ; also J. A. S. B., 1855 ; 

 = B. ceranospatana, Frauenfeld, Ver. zool.-bot. Ges. Wien, 1862; Con. 

 Indica, pi. 38, figs, 1 and 4. 



30 Calcutta, Hazrapur, Barrackpore, and Baniganj -, coll. Dr. F. Stoliczka 



and G. Nevill, Esq. 

 30 Assam; ex c. Dr. T. Oldharn. 

 20 Bengal; ex c. As. Soc. Bengal [? typical]. 

 9 Sambhar Lake, and Sind ; coll. Dr. F. Stoliczka. 



4 Patna and Rurki ; coll. J. Wood-Mason, Esq., and Colonel G. B, Main- 

 waring. 

 30 Ferozpur; coll. Captain R. C. Temple. 



subvar. carinulata. 

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

 A remarkably deformed, abnormal specimen. 



subvar. gigantea. 



1 Calcutta; coll, Dr. F. Stoliczka. 



