CERION, GROUP III. 193 



obtuse. Whorls 10^ or fewer, but slightly convex, evenly sculptured 

 with fine riblets or rib-striae^ about 45 on the penult, whorl in large 

 specimens. Aperture truncate-ovate, flesh or brown tinted within ; 

 peristome narrowly reflexed, convex, often strongly thickened ; 

 parietal lamella rather short; axial lamella rather acute. Parietal 

 callus usually rather thin and transparent. 



Length 27, diam. 11^ mill. 



Length 30, diam. 11 mill. 



Length 19J, diam. 9 mill. 



Porto Rico: Ponct (typical form, R. Swift). Virgin Islands: 

 Anagada (Swift) and Necker Island, near Virgin Gorda (Dr. 

 Cleve). 



Pupa crassilabris Shuttleworth MS., SOWERBY, Conch. Icon., xx, 



pi. 2, f. 14 (May, 1875) Pupa striatella Fer., KUSTER, Conch. 



Cab., p. 91. pi. 10, f. 14, 15; SOWERBY, t. c. pi. 3, f. 18 , b 



Pupa microstoma var. } PFR., Mai. Bl., 1852, p. 208; Monogr., iv, 

 p. 660. 



This species is quite distinct by its exceedingly obtuse apex. Fig- 

 ures 50-52 represent specimens from Ponce, Porto Rice, the larger 

 ones being typical. 



On Necker Island the shells are white. On Anagada they are 

 small, rather egg-shaped, and vary from white to copiously marked 

 (pi. 33, figs. 47-49). Specimens measure : length 23^, diam. 9^ 

 mill.; 20x10 ; 18x9^. The last measurements are of a specimen with 

 8^ whorls, with about 65 rib-striae on the penultimate whorl. 



Some specimens in the collection before me are marked " San 

 Domingo " and " Cuba," but I have little doubt that these data are 

 incorrect. The species has been commonly named "P. striatella" 

 in collections. It differs decidedly from the original figure of that 

 species in the much more obtuse apex. 



In the type specimen (pi. 60, fig. 22) the lip is somewhat thicker 

 than in most shells I have seen, but the general form, very obtuse 

 apex, sculpture and color are the same. A tray of the specimens 

 before me was labelled by Shuttleworth. The original description 

 is as follows : " Shell subcylindrical, obtuse, pinky- whitish, clouded 

 with brown, finely ribbed; aperture somewhat auriform, two-plaited, 

 margin doubled." 



Sowerby's figure of Pupa antoni (C. Icon., f. 9) looks like crassi- 

 labre. 



