I30 Brvaxt Walkkr 



Genus TULOTOMA Haldeman, 1840. 



Tui^OTOMA ANGULATA (Lea). 



The opinion of Lewis (71, p. 24) and Wetherby (164, p. 207) that this 

 is specifically distinct from magnifica Con. is no doubt correct. 



TuLOTOMA coosAENSis (Lea). 



This species described as a Paludina and referred to Vivipara by Binney 

 and to Lioplax by Tryon (132, p. 36) is a Tulotoma as stated by Wetherby 

 (164, p. 212). 



Family VALVATIDiE. 

 Genus VALVATA O. F. Miiller, 1774. 



Valvata bicarinata Lea. 



Is a valid species. See Walker, 146, p. 124 and 147, p. 29. 



Vai^vata bicarinata connectans Walker. 



Valvata bicarinata connectans Walker, Naut., XX, 1906, p. 30. 

 Type locality : Lake Michigan, New Buffalo, Mich. 



Vaevata bicarinata normaeis Walker. 



Valvata bicarinata normalis Walker, Naut., XV, 1902, p. 125, fig. 5. 



Type locality : Not specified. 



Habitat: Muscatine, la. and Utica, Ills. 



Valvata bicarinata pERDEprEssa Walker. 



Valvata bicarinata pcrdepressa Walker, Naut., XX, 1906, p. 30, pi. I, figs. 



15-16. 

 Type locality: Lake Michigan, Michigan City. Ind. 



Valvata calli Hannibal, Naut., XXIIT, 1910, p. 107. 



Tvpe locality: Marl-deposit, Upper Lahontan Quaternary, Summer Lake, 

 Or. 



Valvata humeralis calieornica Pils. 



Valvata humeralis californica Pilsbry, Naut., XXII, 1908, p. 82. 

 Type locality : Bear Lake, San Bernardino Co., Cal. 



