42 



PROCEEDINGS OF THE ACADEMY OF 



[Feb, 



NOTES ON THE ANATOMY OF OREOHELIX. 11. 

 BY HENRY A. PILSBRY. 



The following notes supplement those contained in these Proceed- 

 ings for 1916, pp. 340-359. With one exception they deal with 

 material collected by Professor Junius Henderson and Mr. L. E. 

 Daniels in Utah and Idaho, in 1916. A single species taken by 

 Mr. Ferriss in southern Nevada is also included. 

 Oreohelix haydeni and subspecies. Fig. 1. 



The typical form has not been rediscovered, but it is not likely to 

 differ materialh' in genitalia from the numerous forms of the species 

 already dissected. The several subspecies are much alike in soft 

 .anatomy; the chief cUfferentiation has been in the shells. The 

 researches of Messrs. Henderson and Daniels in 1916 have added 

 materially to our resources, particularly in northeastern Utah. 



Fig. 1. — a, Oreohelix haydeni hybrida, St. Charles, Idaho; c, Devil's Slide, Utah, 

 Station 54; b, 0. h. mixta, Glenwood Springs, Colo., Station 134. 



As the printer transposed several columns of my former table 

 of measurements,^ the entire series of measurements of genitalia is 

 given below. This replaces the table given in 1916. 



As 0. h. oquirrhensis form utahensis Hemph. was very inadequately 

 defined, and no type seems to have been selected, I name No. 23,051 

 A. N. S. P., as lectotype, in order to have a definite standard. This 

 specimen was described in Nautilus, XXIX, p. 141, April, 1916. 



1 Proc. a. N. S. Phila., 1916, p. 347. 



