Catai,ogui; Recentta^ DE;scRiBiiD Mollusca 141 



Genus LITTORIDINA Souleyet, 1852. 



LiTTORiDiNA MONROENSis (Fraueiifeld) . 



Hydrobia monroensis Franenfeld, Verb, der k. k. Zool.-'bot. Gesell. Wien, 

 1863, p. 1023; Pils'bry, Pr. A. N. S. P., 1889, p. 88, pi. Ill, figs. 17-19. 

 Bythinella monroensis Tryon, Mon. 1870, p. 48. 

 Type locality : Lake Monroe, Fla. 



The generic position of this species, which was doubtfully referred to 

 Littoridina by Pilsbry (94, p. 22) has since been confirmed by him. It is not 

 the Bythinella monroensis of Dall (28, p. 256). 



vSubfamily LYTH0GLYPHIN;E Fischer, 1885. 



Genus COCHLIOPA Stimpson, 1865. 

 CocHi^ioPA ROWiJixi Tr3^on. 



The occurrence of this species in Cahfornia is considered doubtful by 

 Pilsbry (100, p. 91) and by Pilsbry and Ferriss (106, p. 172). Rowell how- 

 ever insists that the types were collected by him ''near Baulinas Bay (not 

 Clear Lake), Marin Co., Cal." (114, p. 10). 



It is known to inhabit Nicaragua. 



CocTiLiOPA RiOGRANDENSis Pilsbry and Ferriss. 



Cochliopa riograndensis Pilsbry and Ferriss, Pr. A. N. S. P., 1906, p. 171, 



pi. IX, figs. 10-13. 

 Type locality: Rio San Filipe, near the Rio Grande, Val Verde Co., Texas, 



Also Devil's River in the same county. 



Genus FLUMINICOLA Stimpson, 1865. 



Hannibal (53, p. 186) has proposed a new subgenus HeatheJla, "readily 

 distinguished by its globose form," having P. seminaUs Hds. as the type 

 and including F. fusca, merriami, erythropoma, columhiana and minutissiiua. 



Fluminicoea COLUMBIANA Hemphill. 



Pluminicola columhiana "Hemphill," Pils'bry, Naut., XII, 1899, p. 125 ; Pr., 

 U. S. Nat- Mus., XXIV, 1901, p. 285, fig. 3. ' ."" 



Type locality : Columbia River, Washington, near Wallula and near mouth 

 of Snake River; Snake River, near Weiser, Idaho. 



Fluminicoi.a erythropoma Pilsbry. 



Fluminicola fusca minor Stearns, N. Anier. Fauna, No. 7, Pt. II, 1893, p. 



282. No description. 

 Fluminicola erythropoma Pilsbry, Naut., XII, 1899, p. 125. 

 Type locality: Ash Meadows, Nye Co., Nev. 



