OF CONCHOLOGY. 3^5 



13. H. Ayeesiana, Newc. 



This well characterized species has been found only at 

 Nootka Sound, and forms, with the two following species, a 

 well marked section of the genus. 



14. H. CREBRISTRIATA, JSTewC. 



San Clementine Island, off Santa Barbara. 



15. H. INTERCISA, W, G. Biuney. 

 Oregon. W. G. Binney. 



I am aware that Mr. Binney claims that these two species 

 are identical. If this be correct there certainly is an error in 

 locality to be corrected. No land shell inhabiting Oregon has 

 been found so^far south as Santa Barbara, and, in this respect, 

 their zoological provinces are as distinct and well-marked as 

 are those of the two temperate zones. 



16. H. TUDicuLATA, Binney. 



The only authentic localities for this species are the neigh- 

 borhood of San Diego, Calevaras Co., (Voy,) and Copperopolis. 

 This last is a small variety, with the peritreme tinged with 

 pink, and much more faintly malleated than the typical speci- 

 mens. It is reported from Oregon, by Dr. Cooper; also from 

 Benecia. In the latter case the S. ramentosa is probably 

 referred to, in the former we are in possession of no data by 

 which we can explain the mistake, 



17. A. Kellettii, Forbes. 



This species, found abundantly by Dr. Cooper on Santa Bar- 

 bara Island, has, probably, a more southern habitat as well. 

 Specimens, kindly forwarded to me by Mr. Cuming, difter from 

 any of the varieties from Santa Barbara by their small size, 

 less polished surface and stronger stride. 



Dr. Cooper, of the Cal. Geological Survey, collected at San 

 Diego another variety (?) much more rounded in the whorls, 

 with the aperture not oblique, but roundly lunar. 



A variety of this last in my Cabinet has, on a white ground, 

 two broad and nine narrow reddish-brown bands on the body 

 whorl. It may claim a position as a distinct species from its 

 different aperture and outline. 



18. H. Tryoni, Newc. 



Santa Barbara Island, (Cooper.) 



