1904.] NATURAL SCIENCES OF PHILADELPHIA. 415 
Bifidaria jamaicensis C. B. Ad. 
The commonest of the recent Pupide, but I failed to find it fossil. 
Greater Antilles. 
Pupoides marginatus Say. 
I got one indubitable specimen from locality 809, but it went to 
pieces in my hands. I found only two or three recent ones. Mr. 
Owen Bryant, who was collecting at the same time, found a larger 
number. Eastern and Central North America, and some West Indian 
islands. 
Carychium bermudense n. sp. Pl. XXXVI, figs. 11, 12. 
Shell almost regularly tapering, corneous-white, imperforate, finely 
striate; whorls about 5, increasing regularly, those of the spire very 
convex, with deep sutures. Aperture quite oblique, obstructed by a 
small parietal and a very minute, deeply placed columellar lamella. 
Peristome broadly expanded and reflexed, thickened within by a white 
callus, with a slight groove on its front face, and developed inward 
to form a prominence slightly above the middle of the outer margin 
(near the position of the upper palatal fold in Bifidaria). 
Alt. 1.8, diam. .9 mm. 
This species is very dissimilar to the slender Carychium jamaicense. 
The shape of the aperture allies it more nearly to Carychiwm exiguum 
of North America, but its heavy peristome is quite its own. 
It is one of the most abundant fossil species, occurring in the red 
earth of localities 806 and 807, and even in the sand that fills the larger 
shells in the sand pits. 
Pecilozonites nelsoni (Bld.). 
Hyalina nelsoni Bld., Ann. Lye. N. H. of N. Y., XI, 1875, p. 78. 
P. nelsoni Pilsbry, Proc. Acad. Nat. Sci. Phila., 1888, p. 590. 
P. nelsoni v. Mart., Sitzungsber. Ges. Nat. Freunde, Berlin, 1889, p. 201. 
The typical form of this species is, I suppose, the large, moderately 
elevated form. This is represented among my specimens from locality 
814, where the variation in dimensions is as follows: 
Alt. 29 Diam. 39 mm. 
28 a 
PA Al 
yi 40 
26 35 
25 39 
2a 36 
23 41.5 
23 (estimated) 35 
The way these lay, piled together in a little pocket, compels the 
supposition that they lived at about the same time, and their varia- 
