1 88 Bryant Walke;r 



Family SPH^RIID^. 



Sterki's '"Preliminary Catalog" (125, p. 429) has brought the subject 

 down to July i, 19 16. 



For valuable papers on the anatomy, reproduction and growth of SpJicc- 

 rium and Musculiuin, see Drew (36, p. 173) and Gilmore (46, p. 16). 



Genus SPH^RIUM Scopoli, 1777. 



SPHiURiuM ivENTicuLARE Sowerby. 



Sphceriiim lenficularis Sowerby, Con. Icon., Sphserium, Sp. 6, pi. I, iig. 6. 

 Type locality : ? 



Spii.^rium magnum Sterki Mss. 



Sphceriiim magnmn "Sterki", Springer, Pr. A. N. S. P., 1902, p. 513. 



This undescri'bed species is quoted from Arroyo Pecos, Las Vegas, N. 

 M. (pleistocene) by Springer. . 



Sph^rium medium (Sowerby). 



Cyclas medium "Sowerby", Richardson, Fauna Bor. Amer. Ill, 1836, p. 316. 

 Type locality : Methy Lake, Athabaska. 



Probably never described, see Dall (32, p. 140). , , 



Sph.5;rtum rucosum "Whitmore" Sowerby. 



Sphceriiim rugosum "Whitmore" Sowerby, Con. Icon., Sphserium, Sp. 16, 



pi. II, fig. 16. 

 Type locality : ? 



Sph.hjrium stagnicolum (Sowerby). 



Cyclas stagnicola "Sowerby" Richardson, Fauna Bor. Amer. Ill, 1836. p. 



316. 

 Type locality: Methy Lake, Athabaska. 



Probably never described, see Dall (32, p. 140). 



Genus MUSCULIUM Link, 1807. 



Miisculinm Link, Beschr. Rostock Samm I, 1807, p. 152. 

 Calyculina Clessin, Mai. Blatt, XIX, 1871, p. 150. 

 Frimella Cooper, Pr. Cal. Acad. Sci., (2), III, 1891, p. 82. 



Musculium coopErianum (Prime) Mss. 



Sphceriiim cooperianimi Prime, Cat. Corbie, Am. J. of Con., V, 1869, p. 152. 

 Type locality: Johnson's Pass, Eldorado Co., Cal. 



Listed as a new species, but never described. Probably the young of 

 M. raymondi according to Cooper (26, p. 81). 



