THE NAUTILUS. 141 



Museum of Natural History. While resembling the smoothest 

 examples of var. utaheasis, this shell from the Big Horn Moun- 

 tains is certainly a distinct species from the Oquirrh shell. It 

 is the species to be described below as Oreohelix strigosa magni- 

 cornu. 



Var. utahenm Hemph. should stand, I believe, as 0. haydeni 

 utahensis. It has very much the shape of 0. hemjyhilli, but 

 differs by the much less convex whorls of the embryonic shell. 

 It is typically without spiral sculpture on the last whorl, but 

 some of Hemphill's specimens show widely spaced spiral 

 beaded lines, making a transition to var. gabhiana Hemph. A 

 typical specimen, without spirals on the last whorl, measures, 

 alt. 10, diam. 16.5 mm. (No. 23051 A. N. S. P. collected by 

 Hemphill). 



On account of the variability of the Oquirrh shells, I have 

 some doubt whether, with larger collections, it will be possible 

 to recognize more than one subspecies of 0. haydeni in that 

 range, in which case I would select the name 0. h. oquiii-hensis 

 to cover all. Mr. Hemphill recognized in the Oquirrh varieties 

 utahensis, oquirrhensis, and gabbi ana, also "typical haydeni,^ ^ 

 and on his labels he called some H. hemphilli. Until we have 

 adequate collections it may be possible to define three races in 

 the Oquirrh range, but certainly not five. 



The synonymy of Oreohelix haydeni utahensis will stand thus : 

 IPatula strigosa var.] Utahensis Hemphill, in Binney, Second 

 Suppl. Terr. Moll. V., p. 30. 



iPatida strigosa'] var. Utahensis Hemphill Binney, t. c. , p. 33 

 (locality, but not figure cited or description given) ; see Man. 

 Conch, viii, p. 118, pi. 42, figs. 10, 11. 



Binney' s paragraph under " Paitt/a strigosa, var. Utahensis, 

 Hemphill " in the fourth Supplement, 1892, p. 173, is largely 

 a repetition, and excepting for his reference to the Second Sup- 

 plement, it belongs to 0. s. magnicornu. 



Oreohelix strigosa magnicornu, n. subsp. 



The shell is solid, the first 3^ whorls but slightly convex, 

 pale brown with a faint darker spiral band (or none), the later 

 whorls nearly white (the shell being more or less bleached). 



