Sterki: North American Sph.eriid.e. 445 



Habitat. — Agawam River at East Wareham, Massachusetts. Sev- 

 eral hundred specimens were collected in 1908 by, the Rev. H. W. 

 Winkley, and are in his collection and in that of the Carnegie Museum, 

 No. 5,346. Most of the specimens have the beaks plain, not calycu- 

 late. Specimens collected later at the same place by Mr. William F. 

 Clapp are of the same shape and appearance, but smaller, and almost 

 all are incrusted with a ferruginous deposit. Similar forms have been 

 seen by the writer from Rhode Island, New York, and Ohio. 



29. Musciilium parvum Sterki. 



Musculium parvum Sterki, Nautilus, XXIII, 1909, p. 67. 

 Habitat. — Ohio, Indiana, New York, Maine. 

 Fossil. — Michigan. 



30. Musculium australe sp. nov. 



Somewhat like M. spharicum, but smaller; superior margin markedly 

 curved, angular in the middle; beaks prominent, strongly inclined 

 forward; surface shining; shell translucent, corneous. 



Since no M. sphcericum have been seen from south of northern 

 Ohio and Indiana, and of M. secnris only a few from South Carolina, 

 small and angular, it appears to be proper to tentatively regard M. 

 australe as distinct, differing as it does in size and shape from the 

 species just named. 



Habitat. — Florida, Alabama, Louisiana. A number of specimens 

 from Tallahassee, Florida, are in the collection of Mr. Bryant Walker 

 and the Carnegie Museum, No. 5,240. These are dead shells, some- 

 what bleached, but good, and may be regarded as typical. Smaller 

 specimens are at hand from Louisiana, collected by Mr. L. S. Frierson 

 in De Soto Parish and Rambin Bayou in 1903 and 1906 (Carnegie 

 Museum, Nos. 4,257 and 5,230). 



31. Musculium lenticula (Gould). 



Sphcerium. lenticula (Gould MS.) Prime, Proc. Acad. Nat. Sci. Philada., i860, p. 36 



[Cited from Dall, Alaska, Mollusca, p. 140]. 

 Spharium lenticula Prime, Mon. Corb., 1865, p. 51, excl. syn. 



At least part of the specimens ranged under this name appear to be 

 M. lacustre M tiller. 



Habitat. — California, British Columbia (?). 



32. Musculium uintaense (Call). 



Sphcerium uintaense R. Ellsworth Call, Proc. Davenport Acad. Nat. Sci., V, 1886, 

 p. 8, figs. 



Habitat. — Utah; Uinta Mountains at 10,500 ft. above sea-level. 



