1 88 Bryant Walker 



Family SPH.^RIID.1E. 



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

 down to July i, 1916. 



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

 riiiiii and Musculium, see Drew (36, p. 173) and Gilmore (46, p. 16). 



Genus SPH^RIUAI Scopoli, 1777. 



Si'ii.ii;KiUM LENTICULARE Sowcrby. 



Sphccriuin Icntiailaris Sowerby, Con. Icon., Sphserium, Sp. 6, pi. I, fig. 6. 

 Type locality : ? 



Sni-TiRiUM MAGNiTM Stcrki Mss. 



Sphccriuin uiagnuin "Sterki", Springer, Pr. A. N. S. P., 1902, p. 513. 



This undescribed species is quoted from Arroyo Pecos, Las Vegas, N. 

 VI. (pleistocene) by Springer. 



Sph.i;rium medium (Sowerby). 



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

 Type locality : Methy Lake, Athabaska. 



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



Sph-^RIum rucosum "Whitmore" Sowerby. 



Sphccriuin rugosuiu "Whitmore" Sowerby, Con. Icon., Sphserium, Sp. 16, 



pi. II, fig. 16. 

 Type locality : ? 



Sph.erium 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. 



Muscnlinrn 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. 



Sphccriuin cooperianum 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). 



