Occasional Papers of the Museum of Zoology i r 



50. Anodonta grandis gigantca Lea. — Schoolcraft: A sin- 

 gle valve from shallow water in the river cut-off. 



51. Anodonta grandis footiana Lea. — Alger: One valve 

 from Whitefish Lake with the note (by Wood) : "Shells opened 

 by otter on ice in fall of 1915. Seen and gathered by John 

 Kammer." Chippewa : One broken one from Shelldrake River 

 near Vermilion. 



52. Anodontoides fcrussacianus buchanensis (Lea). — 

 Schoolcraft : One specimen from the same habitat as that of 

 the last named species. Wgev : From Whitefish River. 



53. Unio complanatus "Sol." (Dill.).— Chippewa : Shell- 

 drake River near \'ermilion. Alger: Nine specimens from 

 Whitefish River below Camp White, and one valve with the 

 A. g. footiana with note as under that species. 



54. Sphccrinm sulcatum (Lam.). — Chippewa: From a 

 Beaver Pond near Vermilion. "Form — peculiar; if found at 

 other places, at least a subspecies, proved also by No. 10. evi- 

 dently a juvenile of the same." Sterki. 



55. Sphccrium sulcatum planatum Sterki. — Chippewa : 

 From Shelldrake River, Vermilion. "Somewhat intermediate ; 

 near those from Mountain Lake, Marquette Co., but the latter 

 are much smaller and evidently immature." Sterki. 



56. Sphccrium lincatuui Sterki. — Chippewa: From the bed 

 of Vermilion Lake in water three feet deep. "Large fine speci- 

 mens, much larger than those from Mountain Lake and less 

 angular behind." Sterki. 



57. SpJtcerium stamincum (Conrad). — Chippewa: Shell- 

 drake River, Vermilion.— "A form." Sterki. 



58. Sphccrium vcrmontannm Prime. — Schoolcraft: From 

 a sand bar in the Manistique River. "Not full grown." Sterki. 



According to Sterki (Sterki, p. 435) the habitat of this 

 species is "Lakes Champlain and Nephremagog, Vermont. 



