OP CONCnOLOQY. 315 



15. Aglaja Dupetithouarsii, Deshayes. 



Plate 5, figure 1 7. 



Orbicularly convex, moderately thick, smooth or substriate ; 

 spire obtusely conoidal ; whorls 7-8, narrow, the last inflated ; 

 aperture ovately semilunar, lip a little expanded; umbilicus 

 moderate. Dark chocolate or light greenish when perfectly 

 fresh, with a dark narrow band above the periphery, margined 

 with white, band visible on the spire. 



Diam. 29, height 17 mill. 



Near Monterey, California. 



Closely allied to H. mormonum, but more elevated. 



16. Aglaja rufocincta, Newcomb. 



Plate 6, figure 20. 



Depressed-globose, with impressed suture ; whorls 6, the 

 last not descending at the aperture, minutely decussately striate; 

 aperture subrotund, lip expanded, columella not callous; urn- 

 bilicate. Horny, red banded, lip white. 



Diam. 17, height 10 mill. 



San Diego and I. Santa Catalina, Cal. 



17. Aglaja Gabbii, Newcomb. 



Plate 6, figure 19. 



Depressed-globose ; spire convex, suture well impressed ; 

 whorls 5, convex, the last descending ; aperture suborbicular, 

 lip white, expanded, umbilicus very small, partly covered. 

 Pale corneous, with an indistinct brown band. 



Diam. 10, height 5 mill. 



San Clemente I., Cal. 



