DIMYAEIA (JYEENIDAE SPHAERIUM PARTUMEIUM. 949 



FAM. CERIPHASIID^. 



Genus CERIPHASIA, Swains. 

 ? CERIPHASIA LIVESCENS, Menke. 



A numerous species in the Northwestern States, originally described 

 from Lake Erie, New York, by Menke. 



? CERIPHASIA SUBULARE, Lea. 

 From rivers and creeks of Northwestern States ; Detroit River. 



CLASS CONCHIFERA. 



ORDER DIMYARIA. 



SUPERFAMILY CORBICULACEA. 



FAMILY CYRENID^. 



Genus SPHAERIUM, Scopoli. 

 SPH^RIUM PARTUMEIUM varietas, Say. 



Cyclas partumeia, SAY, Jour. Acad. Nat. Sci. Phila., ii, 1822, 380. 

 Cyclas cornea, var. 2, LAMARCK, Au. saus Vert., v, 1818, 558. 

 Cyclas orbicularia, BAREATT, Am. Jour., xlviii, 1845, 270. 

 Cyclas mirabilis, PRIME, Proc. Bost. Soc. Nat. Hist., iv, 1851, 157. 

 Cyclas ccerulea, PRIME, loc. sub cit., iv, 1851, 101. 

 Cyclas eburnea, ANTHONY, loc. sub cit., iv, 1852, 279. 



Splucrium partumeium, PRIME, Mou. Am. Corbiculadte, Smitbson, Miscel. Pub., No. 145, 

 18G5, 45. 



The specimens collected by the expedition were submitted to Mr. Tem- 

 ple Prime, of New York, who has kindly furnished the following notes : 



" This is a very interesting variety, forming, as it were, the connecting 

 link between S. partumeium, of the east, and S. lenticula, Gould, of the 

 west coast. It offers many points of resemblance with partumeium var. 

 jayanum, from the East ; it is, however, more transverse than this variety. 



" TEMPLE PRIME. 

 "MAY, 1875." 



NOTE. Since the above was written, the specimens have been re-ex- 

 amined by Dr. Lewis, who states his belief that the species above indicated 

 is S. trwicatiiin Linsby. 



