208 PROCEEDINGS OF THE ACADEMY OF [1895. 



Cerion (Maynardia) regina P. and V. 



Shell like C. regium Bens, in form, color, and the expanded, ex- 

 cavated umbilical area; lip narrower ; ribless except on the last 

 whorl, which has few irregularly spaced ribs, or in some specimens 

 uneven, sparse ribs are found throughout the cylindrical portion. 

 Parietal tooth short. Alt. 30-331; diam. 12 mm. Turk's Island 

 (Swift, Gabb). 



This species has affinities with C. columna of Inagua, G. regium 

 of Castle Island, C. lentiginosum and G. album of Rum Cay. The 

 first is more elongated and pillar-like, with very dark mouth ; the 

 second is stouter, heavier, with far wider, thicker lip — in fact, a lip 

 of quite Ethiopian characteristics; and the two forms from Rum Cay 

 are distinguished from all the preceding by the close, even micro- 

 scopic costulation of their earlier whorls. 



C. regina percostatum P. and V. 



Form of shell and mouth as in G. regina; but whole surface except 

 nepionic apex, regularly ribbed, as in Strophia alba Mayn. , except 

 that the ribs on cylindrical portion are wider spaced. White, much 

 mottled and clouded with brown. Holds the same relation to ( '. 

 regina that album holds toward lentiginosum. Alt. 35'.; diam. 13 

 mm.; often smaller in the same proportions or comparatively wider. 

 Mouth longer than in C. album Mayn. Turk's Island. 



Cerion regina comes P. and V. 



Shell with the form, size and sculpture of G. regina, but coloring 

 of C. lentiginosum Mayn.; heavily streaked and blotched with chest- 

 nut brown, on the cone finely speckled and zigzagged. Turk's 

 Island. ( Swift, Gabb, et al.) 



Cerion regina Swiftii P. and V. 



Shell with the elongated form and large, excavated umbilical 

 tract of C. regina, but smaller, thinner, distinctly tapering from the 

 body- whorl upward; parietal callus very heavy in adults, parietal 

 lamina low, deep-seated. Color varying from white to chestnut, 

 streaked and speckled with white. Alt. 26; diam. 10 mm. Turk's 

 Island. (C. Blume, in Robert Swift collection, A. N. S.) 

 Cerion regina eucosmium P. and V. 



Shell with the form and size of regina, but smooth, glossy, rib- 

 less, or with a few irregular ribs on body-whorl ; livid, pinkish- 

 brown, streaked and speckled with white. 



