1917.] 



NATURAL SCIENCES OF PHILADELPHIA. 



101 



Localities in the Black Range and environs are given below. It 

 is not confined to limestone exposures, but is quite sparsely scattered 

 on shaded hillsides throughout the forested zone of the range from 

 Saw\'er Peak northward. 



Sawyer Peak, Station 17|, west side of the north peak, near the 

 summit. 



Silver Creek, at stations 3, 4|, 6, 7, 9; Bull Top Creek, Station 13. 



Spring Creek, Station 15; 

 Iron Creek, stations 16 and 16^ 

 (Wright's cabin). Between Iron 

 Creek and Hillsboro Peak. 



Heads of Animas Canyon at 

 Holden's Spring, Station 26, 

 and at stations 29, 30, 32, 33, 

 northward. 



Near AIcKnight's cabin, Sta- 

 tion 36; stations 38, 39|, 40, 

 the last 8 miles north. 



Black Canyon region at sta- 

 tions 41, 42. 



Morgan Canyon, stations 44, 

 45, 48. 



Diamond Creek, Station 50, 

 about halfway down the moun- 

 tain on the west side. 



East of the Black Range it 

 was taken at — 



Sam's Canyon, about 6 miles 

 south of Chloride, dead only. 



San Mateo Mountains, every- 

 where on the south side, abun- 

 dant. 



Specimens from Holden's Spring (Station 26) were dissected last 

 year. See Proc. A. N. S. Phila., 1916, p. 351. Two more have 

 been opened, giving the following measurements of the genitalia: 



Fig. 5. — Reproductive organs of Oreo- 

 helix cooperi from Holden's Spring, 

 Black Range, with detail of the 

 penis, opened at upper end of the 

 internally ribbed portion. 



No. 115,156. 



Silver Creek. 



Station 4|. 



Length of penis 21 mm. 



" " internallv ribbed part 11 " 



" epiphalliis 4.5 " 



" " penial retractor muscle 10 " 



Diameter of the shell 22 



No. 112,920. 

 San Mateo 

 Mountains. 



13.5 mm. 

 8 

 5 



7 





