GASTEROPODA. 115 



Lyogyrus brownii (H. F. Carpenter). 



Amnicola brownii H. F. Carpenter, Central Falls (R. I.) Weekly 

 Visitor, 1872; Random Notes Nat. Hist., 1885, vol. 2, p. 63. 

 " Cunliff's Pond, at Elmville, [R. I.]." 



R. I. — Lakes in Roger Williams Park, and old Warwick Pond 

 near Providence. 



*Lyogyrus granum (Say). 



Pilsbry, Nautilus, 1898, vol. 12, p. 42. 



Paludina grana Say, Journ. Acad. Nat. Sci. Phila., 1822, ser. 1, 

 vol. 2, p. 378. " Pennsylvania." 



Amnicola granum Gould, Inv. Mass., 1870, p. 294, fig. 560. 



Mass. — South Sudbury. 

 Conn. — New Haven (Linsley). 



*Somatogyrus subglobosus (Say). 



Baker, Bull. Chicago Acad. Sci., 1902, no. 3, pt. 2, p. 340, fig. 123. 



Paludina subglobosa Say, Joum. Acad. Nat. Sci. Phila., 1825, 

 ser. 1, vol. 5, p. 125. " north-western Territory." 



Somatogyrus isogonus Binney, Smithson. Misc. Coll., 1865, vol. 7, 

 art. 3, p. 77, fig. 151. 



Vt.— St. Albans Bay, Lake Champlain (Dr. H. F. Perkins). 



*Bythinia tentaculata (Linne). 



Baker, Bull. Chicago Acad. Sci., 1902, no. 3, pt. 2, p. 328, fig. 34, 

 figs. 116, 117. 



Helix tentaculata Linne, Syst. Nat., ed. 12, 1767, vol. 1, p. 1249. 

 " IN Europae stagnis." 



Vt. — Lake Champlain (Dr. H. F. Perkins). 



*Paludestrina salsa Pilsbry. 



Pilsbry, Nautilus, 1905, vol. 19, p. 90, pi. 3, fig. 10, " Cohasset, 

 Mass." 



