THE NAUTILUS. 139 



While the shell of this species has all the appearance of a Sonor- 

 ella, the soft anatomy shows that it belongs to the subgenus Micra- 

 rionta, of Epiphragmophora, represented by E. gabbi, facia, steamsi- 

 ana, etc., the genitalia being typical for that group. In Sonorella I 

 have figured the anatomy of eight species and subspecies. All agree 

 in having a well-developed penis, and the flagellum is excessively 

 short or wanting, usually about half a millimeter long, in one case 

 one mm. long, but its length is always a very small fraction of that 

 of the epiphallus. In no Sonorella is there any trace of dart sack or 

 mucous glands. This is very unlike these organs in E. hutsoni. 



The unexpected internal anatomy of this species emphasizes the 

 uncertainty of dealing with Sonorella-libe Helices without examina- 

 tion of the soft anatomy. How many of the supposed Sonorellas of 

 southeastern California may really prove to belong to Micrarionta is 

 problematic, but perhaps all those with the embryonic sculpture like 

 E. hutsoni will eventually be removed from Sonoralla. 



EXPLANATION OF PLATE IX. 



Figs. 1-3. Epiphragmophora hutsoni, shell. 



4. Apex, enlarged. 



5. Teeth. 



6. Genitalia. 



7. Jaw. 



8. Diagram of dart sack and mucous glands, d. s., dart sack ; 

 epi., epiphallus ; ft., flagellum ; m. gl., mucous glands. 



DESCRIPTIONS OF CYPRAEA BERNARDINO AND CALLIOSTOMA 



CARNICOLOR N. SP. 



BY H. B. PRESTON. 



CYPRAEA BERNARDINO n. sp. PI. VIII, fig. 8. 



Shell oval, with a well-defined dorsal line dividing into a small 

 fork near the anterior extremity; dorsal surface brownish-gray 

 flecked with white spots and streaks ; sides white, sparsely spotted 

 with chestnut, a number of dashes of the same color appearing at the 

 anterior extremity and slightly crenulated at the margins of the dor- 

 sal surface ; extremities obtuse ; base white ; columella somewhat 

 straight, bearing seventeen rather fine, white teeth ; peristome very 

 slightly curved, having fifteen teeth ; aperture narrow. 



