Catalogue Recentia' Described Mollusca 141 



Genus LITTORIDINA Sonleyet, 1852. 



LiTTORiDiNA MONROENSis (Fraueiifeld) . 



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

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

 BytJiinella monroensis Tryon, Alon. 1870, p. 48. 

 Type locality : Lake ]\ronroe, 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 BythincUa uwnrocusls of Dall (28, p. 256). 



Subfamily LYTHOGLYPHIN.F: Fischer, 1885. 



Genus COCHLIOPA Stimpson, 1865. 

 CocKLiOPA ROWEiXi Tryon. 



The occurrence of this species in California is considered doubtful by 

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

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

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



It is known to inhabit Nicaragua. 



CociiLiOPA RioGRANDENSis Pilsbry and Ferriss. 



Cochliopa riograndev.sis 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, \"al \^erde Co., Texas. 



Also Devil's River in the same county. 



Genus FLUAIINICOLA Stimpson, 1865. 



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

 distinguished by its globose form," having F. scininalis Hds. as the type 

 and including F. fnsca, uierriaini, erythropoina, colnmbiana and minntissiiua. 



Fluminicola COLUMBIANA Hemphill. 



Fhuninicola cohinibiana "Hemphill," Pilsbry, Naut., XII. 1809, 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. 



Fluminicola ervthropoma Pilsbry. 



Fhiminicola fnsca minor Stearns, N. Amer. Fauna, No. 7, Pt. II, 1893, p. 



2^2. No description. 

 Fhiminicola erythropoma Pilsbry, Naut., XII, 1899, P- 125. 

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



