316 AMERICAN JOURNAL 



ft Not handed. 



18. Aglaja Rowellii, Newcomb. 



Depressed -gl obose ; spire but little elevated, projecting at 

 apex like a nipple, suture moderate; whorls 4|, polished, very 

 finely obliquely convex, the last large, descending at the aper- 

 ture; aperture circular, lip thin, a little expanded, margins 

 continued, adhering to the last whorl ; umbilicus open. 

 Opaque-white (bleached?) 



Diam. 15, height 10 mill. 



Arizona. 



I have not seen this species, but doubt (from the descrip- 

 tion) whether its affinities are with this group. 



ARIONTA, Leach. 



The American species are peculiar to Southern California 

 and Northern Mexico. The type of this genus, A.arhustorum, 

 (as well as several other species,) is European, but the follow- 

 ing are scarcely distinguishable from it, although so widely 

 asunder in distribution. As already stated, many of the spe- 

 cies placed in Arionta by Albers, really belong to Aglaja; H. 

 hicincta, Pfeiffer, and H. Townsendiana, are also erroneously 

 classed here by Albers. 



1. Arionta Veitchii, Newcomb. 

 Plate 5, figure 19. 

 Subglobose ; spire turbinate, elevated, suture not very dis- 

 tinct ; whorls 6, a little convex, the last very large, declining 

 towards the aperture ; rather thin, obliquely striate, and some- 

 times a little spirally corrugated ; aperture subcircular, lip a 

 little expanded, and very sliglitly thickened, partly reflected 

 over the narrow umbilicus ; base of shell very convex. Yel- 

 lowish-white, with numerous irregular, interrupted, revolving 

 brown bands. 



Diam. 23, height 19 mill. 



Cerros Isle, Lower Cal. 



