[112] 



Aglaja facta, Newcomb. 



Plate 11, figure 32. 



" Shell with perforation nearly covered, depressed orbicular, 

 solid, compact, smooth, whitish, zoned with a brownish-red band ; 

 whorls 5 to 5J, somewhat convex, the last descending ; suture 

 slightly impressed ; aperture oval ; lip thick, reflected, yellowish. 



Diam. 10, height 5 mill. 



Islands of Sta. Barbara and San Nicolas, off the coast of Cali- 

 fornia." — Proe. California Acad. Nat. Sci., iii., 1864. 



Polymita levis. Pfeiffer.' 



Plate 5, figure 21. 



Plate 6, fig. 6, erroneously referred to this species, is a variety 

 of Arionta Veitchii, Newcomb, from Garros Island (not Bay of 

 Monterey, Cal., as stated in description). The type of Veitchii 

 is figured in pi. 5, fig. 19. 



Conulus chersinella, Ball. 



Plate 11, figures 33, 34, 35. 



" Shell small, somewhat elevated, smooth, except that the 

 lines of growth are occasionally indented ; umbilicus minutely 

 perforate ; aperture semi-lunar and slightly oblique ; whorls ro- 

 tund, 4J to 5 in number ; sutures impressed, not deep ; lip not 

 thickened or reflected. Color yellowish, translucent. 



Diam. -14 in., height '09 in. 



Big Trees, Calaveras Co., California. 



This small species has relations with H. chersina, Say, and 

 IT. indentata. Say. It resembles the former in its small size 

 and many whorls, but differs in color and depressed spire, 

 though sometimes almost as acute. It is related to the latter in 

 its color and indented lines of growth, but differs in its greater 

 number of whorls and much smaller size, and in the proportional 

 size of the last whorl." — American Jour, of Conchology, ii. p. 

 328, 1866. 



