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106 American Seashells
Acmaea antillarum Sowerby Antillean Limpet
South half of Florida and the West Indies.
Plate 17a
% to I inch in maximum diameter, usually very flat, rather thin, oval in
outline but narrou^er at the anterior end. Neatly sculptured with numerous
radial threads. Color variable: exterior whitish with a few or many narrow
or wide radial rays of brownish green. Interior glossy whitish with a darkor
light-brown callus. Borders or sometimes the entire inside marked by
numerous radial lines of purple-brown. These are often divided near the
edge of the shell. Uncommon in Florida, but abundant in the West Indies.
A. candeana Orbigny and A. tenera C. B. Adams are the same.
Acmaea pustulata Helbling Spotted Limpet
Southeast Florida, the West Indies and Bermuda.
I inch in maximum diameter, oval in outline, moderately flat with
rounded sides. Shell thick, with coarse axial ribs which are crossed by fine
concentric threads. Interior glossy-white, with the central callus yellowish.
Exterior chalk-white, dull. Sometimes flecked with red-brown dots and bars.
Common. Formerly known as punctulata Gmelin. A deep-water form,
which is perhaps a young phase, of this species is very thin, light-rose in
color, with a tiny, sharp apex and is occasionally flecked with red. It may be
called A. pustulata pulcherrima Guilding.
Acmaea leucopleura Gmelin Dwarf Suck-On Limpet
Southeast Florida and the West Indies.
Plate 17b
Mi to V2 inch in maximum diameter, high-conic, with numerous, alter-
nating black and white rays. The black rays divide into two near the edge
of the shell. Radial riblets weak, usually black. Interior white, often stained
brown or black on the callus. Frequently found adhering to the underside
of large gastropods such as Livona pica. Common. A. cubensis Reeve and
A. sbjiplex Pilsbry are probably this species.
AciJiaea jamaicensis Gmelin Jamaica Limpet
Southeast Florida and the West Indies.
Plate 17c
V'z inch in maximum diameter, moderately high, with roundish sides,
thick, with about 15 to 20 rather large, rounded, white radial ribs on a blackbrown
background. Sometimes completely white. Interior white, occasion-