346 



PROCEEDINGS OF THE ACADEMY OF 



[May, 



Oreohelix strigosa fragilis (Hemph.). PI. 19, fig. 5. 



Genitalia as in 0. s. depressa, the distal portion of the penis col- 

 lapsing into a trefoil shape in the individual dissected (Station 38). 



Length of penis 18 mm.; of internally costate part 5 mm.; epiph- 

 allus 4; penial retractor 6 mm.; diameter of the shell about 19 mm. 

 Oreohelix strigosa buttoni (Hemph.). PI. 21, fig. 6. 



Genitalia as in form tooelensis, 0. s. depressa from Provo, and 

 others, the penis collapsing flat. The lower part has 5 ribs within. 

 Length of penis 25 mm., of internally costate portion 10, of epiphallus 

 7 mm., penial retractor 15 mm.; vagina 6.7 mm. The specimens 

 came from Station 16, Taylor Canyon, near Ogden, Utah. 



Measurements, in mm., of the genitalia of Oreohelix strigosa depressa. 



Oreohelix hendersoni Pils. PI. 20, fig. 7. 



The length of the penis is three-fourths of the diameter of the 

 shell. Its internally costate segment is one-third the total length, 

 and the distal papillose portion is somewhat flattened. Length of 

 the epiphallus is contained 2f times in that of the penis. The 

 penial retractor muscle is shorter than usual in P. strigosa depressa. 



