64 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Remarks: This mountain race appears to be somewhat 

 similar to Bartsch's avus in shape, size, and the narrow um- 

 bilicus, but differs in the zvcak papillation of the upper surface, 

 and the presence of a weak spiral sculpture. From zcchce Pils- 

 bry, it is distinguishable by its thinner, more tumid shell, much 

 narrower umbilicus, and the better developed papillation of the 

 upper whorls. None of the other described races appears to 

 require any special comparison. 



LITERATURE 

 Bartsch, P. 



:16. The Californian land shells of the Epiphragmophora traskii 

 group. Proceedings United States National Museum, v. 51, pp. 

 609-619, pis. 114-117, December, 1916. 



Berry, S. S. 



:16. Three new Helices from California. University California Pub- 

 lications, Zoology, V. 16, pp. 107-111, January 5, 1916. 

 :19. Three new alpine Vertigos from California. Nautilus, v. ZZ, 

 pp. 48-52, text f. 1-8, October, 1919. 



Binney, A. 



'43. Descriptions of two undescribed species of North American 

 Helices. Boston Journal Natural History, v. 4, pp. 360-362, pi. 

 16, f. 17, pi. 20, 1843. 



Newcomb, W. 



'61. Descriptions of new shells. Proceedings of the California 

 Academy of Natural Sciences, v. 2, p. 91, February 4, 1861. 



Pilsbry, H. A. 



:13. Note on a new variety of Epiphragmophora tudiculata. Nau- 

 tilus, V. 27, pp. 49-50, pi. 3, f. 15-17, August-September, 1913. 



:16. A new Californian land snail. Nautilus, v. 29, pp. 104-105, pi. 

 3, lower figs., January, 1916. 



