A< M.KA. 37 



The species may be briefly diagnosed as follows : 



.-I . punctulata Grn. Depressed or low-conic, the apex acute, conical, 

 subcentral ; riblets irregular ; pinkish, usually dotted with red. 

 Inside white with a narrow, pale margin, the spatula white or sal- 

 mon colored. 



A. candeana Orb. Depressed, low-convex, closely and finely 

 radiately striate. Light yellowish with narrow brown lines usually 

 gathered into rays. Inside with a wide border and central brown 

 area. 



A. earpenteri Pils. Moderately elevated ; closely evenly and finely, 

 rather obsoletely radiately striated ; rayed with pinkish-purple on a 

 light buff ground. Inside with a rather narrow border, spotted at 

 the terminations of the rays. The central area more or less marked 

 with brown. 



A. antillarum Sowb. See under A. candeana. 



A. oni/china Gld. Depressed, solid, having low but rather wide 

 ribs, the fibs and intervals closely, finely, radiately striate. 



A. leucopleura Gm. Conical or depressed, the apex subcentral ; 

 coarsely radiately ribbed, ribs white, intervals dark or spotted 

 with dark brown or black ; inside with a very narrow border and 

 brown or brown-outlined central tract. 



A. cubensis Rve. Conical, solid, with fine radiating riblets ; 

 closely marked with radiating black lines which frequently bifurcate 

 and anastomose ; inside with a verv narrow dotted border and a 

 dark central area. 



A. PUNCTULATA Gmelin. PL 5, figs. 99, 100, 1, 2, 3, 4, 5, 6, 11, 12, 

 13. 



Shell wide-oval, depressed or depressed-conical, the apex acute 

 and subcentral. Surface sculptured with rather rude, low separated 

 riblets of which some (about every third or fourth rib) are larger. 

 Color yellowish or delicate pink, marked with distinct red dots be- 

 tween the riblets. 



There is apparently no epidermis. Often the surface is finely 

 speckled all over with pink, and there is sometimes a blotch of 

 carmine on each side of the apex. The inside is white; the border is 

 very narrow, irregular, translucent gray. There are often reddish- 

 brown dots sparsely scattered along the border, which seem to be 

 under the gray edge. The central tract is short, wide, and either 

 white or of a light salmon color. Length 24, width 19, alt. 7 mill. 



