Catalogue Recenixy Described Mollusca 139 



Hydrobia seemani Frauenfeld, Verh. der k. k. zool.-bot. Gesell. Wien, 1863, 



_ p. 1025; Ibid, 1865, p. 525, pi. VIII. 

 Bythinella seemani Pilsbry, N. Am. Fauna, No. 7, Pt. II, 1893, p. 2^8. 



For an elaborate and fully illustrated account of tbe variation of this 

 protean species, see Stearns' paper cited above. 



PaeudESTRina saesa Pilsbry. 



Paludestrma salsa Pilsbry, Naut., XIX, 1905, p. 90, pi. Ill, fig. 10. 

 Type locality: Cobasset, ]\Iass., in brackish water. 



Paeudestrina stearnsiana Pilsbry. 



Paludcstrina stcarnsiaria Pilsbry, Naut., XII, 1899. p. 124. 



Type locality : Oakland, Cal. x^lso Marin, Tuolumne. Contra Costa and 



Santa Cruz Counties, Cal. Also Ash Canyon and Tanner Canyon. 



Huachuca Mts., Ariz., Pilsbry and Ferriss (io6a. p. 516). 



Genus TRYONIA Stimpson. 1865. 



Pilsbry (96, p. 122), states that Tryonia is probably only a subgenus of 

 Palndestrina. 



Tryonia ceathrata Stimpson. 



This species, described from fossil specimens, has been found living in 

 the Pahranagat V^alley, Nev. (Stearns, 123, p. 281). 



Genus PYRGULOPSIS Call and Pilsbry, 1886. 



Pyrgnlopsis Call and Pilsbry. Pr. Davenport A. N. S., V, 1886, p. 9. 

 Type : Pyrgtila ncvadensis Stearns. 



Pyrgueopsis eETsoni (Walker). 



Amnicola letsoni Walker, Naut., XIV, p. 113 (1901) ; Letson, Bull. Buffalo 



Soc. Nat. Sci., VII, 1901, p. 241, fig. 165. 

 Type locality : Post-Glacial deposit, Goat Island, Niagara River, N. Y. Also 



fossil at Bowmanville, Ills, and living at La Plaisance Bay, Lake Erie, 



Monroe Co., Mich. 

 Goodrich (in lit.) has suggested that this species should be referred to 

 Pyrgnlopsis and I fully agree with him. 



Pyrgueopsis neyadensis (Stearns). 



Pyrgula ncvadensis Stearns, Pr. A. N. S. P., 1883, p. 173, text fig. ; Call and 

 Beecher, Am. Nat.. XVIII, 1884, pp. 851-855; Call and Pilsbry, Pr. 

 Davenport Acad. Nat. Sci., V, 1886, p. 10, pi. II, figs. i-io. 



Type locality : Walker and Pyramid Lakes, Nev. 



