54 



ODOSTOMIA. 



whorl. Sometimes the shell grows to the length of 

 one-fourth of an inch or even more. 



Odostomia satiira, Cpr., sa-tu'-ra, is shown in 

 Fig. 34. The shell is beautifully white and 

 pure, and less solid than that of the last species. 

 Fi „ The sutures are very distinct, and the whorls 

 are checked with a microscopic network of ex- 

 tremely fine lines. It is one-fourth of an inch long. 



Obelisciis variegatits, Cpr., the shell of which is 



shown in Fig. 35, is now believed to be identical 



with the Pyramidclla conica of C. B. Adams, 



Py-ram-i-del'-la con'-i-ca. Both names savor of 



ancient Egypt. It has a perfectly conical, 



tapering shell, composed of about ten whorls. 



There is a fold on the columella as in the Odos- 



5 " tomias. The color is brownish, somewhat 



clouded, and the length is half an inch. It is found 



in southern waters, but is quite rare even there. 



Mumiola cincta, Cpr. , Mu-mi-o'-la sink'-ta. Shell 

 minute, white, few-whorled, having the surface dis- 

 tinctly sculptured or cancellated. Most of the similar 

 species are smooth. This completes our list of these 

 minute shells. 



We turn now to a very distinct and well-marked 

 species, Conns Californicus, Hds., Ko'- 

 nus Cal-i-for'-ni-cus. Fig. 36 shows the 

 appearance of a large specimen. This 

 is our only representative of the great 

 Cone family which has so many beau- 

 tiful examples in the tropical waters of 

 the Pacific and the Indian oceans. 



Our little species is very humble, 



being about an inch in length, of a 



Fig.36. chestnut color, with a smooth surface, 



