1918.] NATURAL SCIENCES OF PHILADELPHIA. 323 
~_ 
O. coopert form apache, new form (pl. VII, figs. 7 to 8a). Rather 
large size, dark or very dark coloring and subobsolete sculpture (the 
spirals being especially weak) characterize the shells taken along the 
Black River and Fish Creek, in Apache County, Arizona. The shell is 
generally quite depressed and as openly umbilicate as the forms of 
O. strigosa. The diameter is usually from 22 to 26 mm. Few have 
the spire very high, and none are as high as many of the Blue River 
shells. 
Fig. 15. Reproductive organs of Oreohelix strigosa meridionalis, the middle 
figure drawn from the type specimen, 
