﻿444 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 47 



Variety a (reticulatum) . PI. lvhi, fig. 8. — Shell smaller, colors 

 tending to livid or purple below ashy white, which is arranged more 

 or less in narrow spiral lines which cut the white wrinkles at nearly a 

 right angle giving a very marked reticulate effect, the striation 

 notably sharper than in the type form. U. S. Nat. Mus., No. 



1 79443- 



Variety b (incisum). PI. lvhi, fig. 10. — Shells stouter, with still 

 sharper sculpture, the form top-heavy, with the maximum diameter 

 nearer the apex than to the base, a less marked umbilicus ; the young 

 with a larger axial perforation and on both the upper and lower 

 walls of the aperture a pair of strong short low laminae beside one on 

 the pillar, making five in all, in the aperture of a shell with six 

 whorls. U. S. Nat. Mus., No. 179,440. 



Variety c (vermiculum) . PI. lvhi, fig. 3. — Shells small, nearly 

 smooth, slender, subfusiform, with the color in large subaxial mar- 

 morations or nebulae. U. S. Nat. Mus., No. 179,442. 



The range of variation in size, sculpture, and color, as above 

 noted, is very large yet the various forms have nevertheless a general 

 resemblance which points to their common origin. Large numbers 

 of the typical form were obtained. 



Dr. Pilsbry remarks of them : " a species not hitherto known, very 

 closely related to agrestinum of New Providence, but with a general 

 tendency to be larger, longer, more solid and varying to smooth, 

 which agrestinum is not known to do. The umbilical slit is also 

 ordinarily longer in your shells and the parietal lamella smaller. 

 The suture above is also more seam-like. These forms are also 

 related of course to marmoratuui, martensi, and various other forms 

 all more remote geographically than agrestinum. C. fordii is a 

 stouter more coarsely sculptured species." 

 Pupoides marginatus Say, var. modicus Gould. 



Nassau, near Fort Charlotte, and Mangrove Cay, Andros ; com- 

 mon. 



The form of P. marginatus found on the islands and on the conti- 

 nent from Chesapeake Bay southward, near the sea, is the form 

 named Pupa modica by Gould. Inland however, even in Florida 

 it assumes its larger and more solid typical form. In a large series 

 a perfect gradation between the two may be established. 



Bffidaria servilis Gould. 



Mangrove Cay, Andros and commonly at Nassau near Fort Char- 

 lotte and the Grantstown road. 

 Subulina octona lirnguiere. 



Nassau, at various localities, common. 



