74 THE NAUTILUS. 
There are one nearly mature specimen and three immature 
ones in the Adams’ Collection received from Chitty and labeled 
‘“obscurus 2’? from Kingston, Jamaica. My own set of four 
specimens was received from Sowerby and Fulton as ‘‘obscurus’’. 
As these are apparently fully developed and are quite congruous 
in character, I have selected one of them as the type. The 
largest specimen in the Adams Collection is narrower than the 
type, the apex less eccentric and the posterior slope is longer 
and nearly straight below the base of the apex. The radial 
sculpture of the apex is very distinct in this specimen. When 
additional material can be obtained, it may prove to be, at 
least, varietally distinct. 
After carefully reviewing my material I am now inclined to 
think that the Guadeloupe specimens considered as conspecific 
in the first part of this paper (Naur., XXXIII, p. 99), though 
rather similar, are different. They will be considered else- 
where. 
This species is also evidently related to A. beawi Bgt. from 
Guadeloupe, but as compared with the figures of Bourguignat’s 
type; it is somewhat larger, proportionately not so wide, the 
anterior slope is less convex, the posterior slope longer and it 
lacks the distinct radial striation on the anterior slope, which, 
though not mentioned by Bourguignat, shows very distinctly 
in the photograph of his type. 
Vi 
Ferrissia adamsin. sp. Pl. III, figs. 7-9. 
Shell depressed, oval, very slightly wider anteriorly; lateral 
margins equally curved; anterior slope nearly straight; posterior 
slope straight below the base of the apex at which point it is 
slightly incurved; left lateral slope very slightly convex; right 
lateral slope a little concave; apex prominent, very obtuse, 
slightly turned toward the right margin, situated nearly on the 
median line and about one-third of the length from the poster- 
ior end, radiately striate; surface smooth except for the distinct, 
rather coarse, regular lines of growth; light horn color. 
Length 4, width 2.75, alt. 1.25 mm. 
Type locality Kingston, Jamaica. 
