90 University of Michigan 



were rarely found in specimens from Curasao (June), but 

 were more common in those from Aruba (July), and were 

 present in a large proportion of the individuals from Bonaire 

 (August), it seems probable that the eggs are laid near the 

 beginning of the wet season. The adult figured (figs, xvi-61, 

 62, 63) is, in each species, the largest specimen collected. In 

 all of the species, the spire is often curved out of line with the 

 lower whorls, but this asymmetrj^ is most common in N. 

 scopulorum. 



Measurements 



Bracliypodella raveni raveni (Crosse) 



Cylindrclla raveni "Bland" Crosse (1872; J. de C, XX, 157) ; Crosse 

 and Bland (1873; J. de C, XXI, fig. 1-4) ; collected by Raven. Bracliy- 

 podella raveni Pilsbry (1903; Man. Conch., XVI, fig. ix-14) ; radula. 



Type locality: Curasao; probably the Schaarlo (C5c), back 

 of Willemstad. 



Distribution of species : Curasao, Aruba ; under limestone 

 rocks near the surface, in all but the most barren localities. 



Distribution of subspecies : Curasao ; from New Port north 

 to Landhuis Hato (at least CI, 3, 4, 5, 6, 7, 11, 12). 



IShell (fig. xvii-67) : brownish in color with lighter ribs, 

 opaque; subacuminate-turrite, greatest diameter at 2i/^ to 3 

 whorls from aperture. Whorls: 14 (in a rather small speci- 

 men), of which about 9 are usually retained; moderately con- 

 vex with well-impressed sutures ; last whorl with basal carina 

 below a peripheral emargination. Sculpture of later whorls : 

 fine, but well-marked growth-riblets, which are usually as wide 

 or wider than their interspaces and slightly crested over the 

 basal carina. Embryonic whorls (fig. xvii-73) : apparently 3, 

 of which the 2nd is as broad or broader than the 3rd; thin, 

 translucent, amber-colored; sculpture of fine, closely-spaced, 



