HAMINEA. 359 



Much larger than antillarum, and more deeply colored. The 

 contour is the same, except that in this the upper part is often more 

 constricted. 



This species is well distinguished by its swollen form, compressed 

 above, excessively fine spiral striation, very deeply concave colu- 

 mella and greenish-yellow color. There is sometimes a slight umbili- 

 cal chink behind the insertion of the lip at the vertex, but there is no 

 trace of a true umbilicus at base. The flexure of the lip forward 

 above is also noteworthy. (See figs. 31, 33). 



H. PETITII d'Orbigny. PI. 41, figs. 23, 24. 



Shell cylindric-oval, truncated above, rounded below. Color light 

 yellowish-green. Surface having indistinct growth-lines but free 

 from spiral striae at least under ordinary magnification. Vertex 

 wide, somewhat impressed in the middle, imperforate, the outer lip 

 arising immediately from the right of the center. Columella rather 

 straightened, sub vertical, its reflexed edge not appressed but leaving 

 a narrow chink ; not folded above. 



Alt. 9, diam. 6 mill. 



St. Thomas (Orb., Swift) ; Tampa, west Florida (Dall). 



Bulla petitii OR*., Moll. Cuba i, p. 130, pi. 4 bis, f. 13-16. 

 Haminea petitii MORCH, Mai. Bl. xxii, p. 174. DALL, Cat. Mar. 

 Moll. S. E. U. S., p. 88. 



This species is similar to H. antillarum in form of the apex and 

 obsolescence of spiral striae ; but it is much more cylindrical and the 

 columella is straighter than in any other West Indian Haminea. 

 This is not well shown in Orbigny's figure. 



West American species. 

 H. VESICULA Gould. PI. 41, figs. 28, 29. 



Shell thin and fragile, globose-oval, slightly narrowed above, 

 rounded below. Color " pale greenish-yellow." Surface sculptured 

 -with indistinct growth-lines and close, fine microscopic spiral im- 

 pressed striae. Vertex narrowly but deeply impressed, imperforate ; 

 lip arising from the left side of the center, slightly but quite visibly 

 ungulate or sinuous near the insertion ; lip bending forward above, 

 broadly rounded at base. Columella very concave, with a narrow 

 reflexed and appressed callus, folded above. 



Alt. 18, diam. 13 mill 



San Pedro, California, south to Cape St. Lucas. 



