106 American Seashells 



Acmaea antillarum Sowerby Antillean Limpet 



Plate 17a 



South half of Florida and the West Indies. 



% 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 dark- 

 or 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 



Plate 17b 



Southeast Florida and the West Indies. 



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 



Plate 17c 



Southeast Florida and the West Indies. 



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 black- 

 brown background. Sometimes completely white. Interior white, occasion- 



