Occasional Papers of the Museum of Zoology 39 



Polygyra profunda (Say). Habitats: 38, 41. Shells from 

 hardwoods (41) of greater diameter and more flattened than 

 those of sandy, outvvash plains (38), where they were more 

 elevated and were more diffusely colored so that in some speci- 

 mens the stripes were practically obscured. 



Shell from hardwoods: alt. 13.4 mm.; g. diam. 26.5 mm. 



Shell from sand plains : alt. 14.2 mm. ; g. diam. 24.5 mm. 

 Sph.eriid.?; 



Sphariuui solid ulu in ( Prime). Habitat 26. Hancock Creek, 

 sandy and mucky bottom. Specimen, "near the typical form,"^ 

 measured : 1. 10.7 mm. ; alt. 8.9 mm. ; width 6.6 mm. 



Splujcrimn soliduluui. var. Habitat 11. A somewhat dif- 

 ferent form from outlet to Hanbury Lake. "Somewhat like 

 soliduluui, but may be distinct" : more rhomboid, with more 

 delicate sulcations than typical form ; umbonal regions copper- 

 colored and edge of shell dark brown. An example: 1. 12.2 

 mm.; alt. 10. i mm.; w. 8.1 mm. 



Sphccrimn stamincum (Conrad). Habitats: 5, 6m, 7, 26, 

 31, 32. Especially abundant in sandy bottoms of large streams. 

 Adults collected throughout the summer with juvenile shells 

 ready for extrusion ; latter are very light in color with heavy, 

 concentric undulations. Juvenile: 1. 3.9 mm.; alt. 3.2 mm.; 

 w. 2.3 mm.; adult: 1. 11.8 mm.; alt. 10.3 mm.; w. 7.4 mm. 

 Several specimens were found that had the hinges reversed. 



Sphcvrium stauiincum, var. Habitats: 30, 34. Specimens 

 from rocky, river habitats not typical, "being somewhat like 

 soliduluui." An example : 1. 8.5 mm. ; alt. 6.4 mm. : w. 5.4 mm. 

 "Rather like S. striatimtm, but apparently somewhat 

 deformed." 



Spliav'ium acuminatum (Prime)? Habitat 25. "Not full 



3 Portions in quotation marks, throughout Sphceriids, are the iden- 

 tification notes of Dr. Sterki. 



