PACIFIC COAST SPECIES. 87 



Eelix conspecta, Bla^td, Ann. N. Y. Lye. vii, 163, fig. 7 (Nov. 1865). 

 Pseudohijalina conspecta, Tryon, Amor. Jouru. Conch., ii, 265 (1866). 

 Hyalinaconsp€cta,\Y. G. BiNXEY, L. & Fr.-W. Sli. i, 41 (1869). 

 Zonites conspectus, W. G. B., Terr. Moll., v, 121. 



In Alaska. In tlie Pacific Province, Salem, Oregon, San Francisco, 

 and Monterey, and in Merced County, Cal. In the Central Province at 

 Cunningham Gulch, Colorado. 



Z. conspectus differs from PatuJa asteriscus in having an elevated spire 

 and a smaller umbilicus. The rib-like strise are more numerous, but 

 scarcely raised above the surface of the shell, which, under the micro- 

 scope, is very similar to that of P. asteriscus. Z. cxiguus also has very 

 prominent ribs, but they are independent of the striii? of growth and 

 run obliquely to them. 



Animal not observed. Mr. Bland's description and figures are here 



given. 



Specimens frome Lone Mountain near San Francisco have been sent 

 me by the Kev. Mr. Eowell as Helix Mazatlanica. (See p. 22.) 



Zonites cliersiiiellus, Dall. 

 Shell narrowly umbilicated, depressed, transparent, lightest horn- 

 color, shining, with distant incremental wrinkles ; spire slightly ele- 

 vated; whorls 4, scarcely convex, the last depressed- ^.^ ^^ 

 globose; umbilicus narrow, pervious; aperture oblique. 

 Innately subcircular; peristome simple, acute. Greater 

 diameter, 3""™ ; height, 1"*™. 



Helix (Copulus) cliersinella, Dall, Amer. Jour. Conch., ii, 328, pi. 



xxi, fig. 4 (1866). 

 Conulus chersinella, TRYOHf, Amer. Jour. Conch., iii, 162 (1867). 

 Hyalina cliersinella, W. G. Binnky, L. & Fr.-W. Sh., i, 47 (1869). z. chemlnellus. 



Zonites cher8inellus,W. G. Binn., T. M., t, 123. 



"Big Trees, " Calaveras County, California: it must be considered a 

 species of the California Region, from the region of the Sierra Nevada. 



The description is drawn from an authentic specimen. The figure 

 is a fac-simile of that of Dall. This is given here because Mr. Dall as- 

 sures me the figures I have formerly given do not represent the spe- 

 cies. 



Animal not observed. 



