[65] 



ft Not handed. 



18. Aglaja Rowellii, Newcomb. 7- c/ 



Depressed -globose; spire but little elevated, projecting at 

 apex like a nipple, suture moderate; whorls 4 J, 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. 



I / / 



ARIONTA, Leach. 



The American species are peculiar to Southern California 

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

 (as well as several other sp(!cies,) 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 II. Townsendiana, are also erroneously 

 classed here by Albers. 



1. Arionta Veitchii, Newcomb, 



Plate 5, figure 19. - ^ ,V?t.^ 



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 slightly 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. 



