24 STOMATELLA. 



scarcely visible ; mouth slate-gray, the margins spotted with red 

 and white. Breadth 1J, length 2 lines. (Anton.') 



Persian Gulf f on pearl oyster. 

 Probably a Gena. 



B. Antillean species. 



S. COCCINEA A. Adams. PL 52, figs. 55, 56. 



Shell perforated, small, depressed, with short, conical spire ; deep 

 crimson with a w'hite umbilical crescent, and often white spots at the 

 periphery. The surface is slightly shining, encircled by numerous 

 raised spirals, of which every 4th one is larger ; midway between 

 these are smaller ones, and there are still finer spiral striae occupy- 

 ing the interstices ; the whole decussated by fine striae of growth. 

 There is an angle or carina midway between the periphery and sut- 

 ure of the last whorl, which angulates the spire whorls. Spire short, 

 conic ; suture impressed. Whorls 4, the apex smooth, white ; the 

 last rapidly enlarging, subangular at periphery. Aperture red with- 

 in, oblique ; inner lip gently curved, narrowly reflexed over but not 

 concealing the umbilical chink. Umbilical tract white, impressed. 

 Color, deep crimson, under a lens seen to be minutely, closely artic- 

 ulated with lighter, especially on the spire, and often with a series 

 of white dots scattered along the periphery. Alt. 3, diam. 4 mill. 

 St. John's (Cuming), St. Thomas, and St. Croix, W. Indies. 



S. coceinea A. AD., P. S. Z. 1850, p. 33 ; Thes. Conch, ii, p. 840, 

 t. 175, f. 35, 36.-rSowB. in Conch. Icon., f. 26. KREBS, The West 

 Indian Marine Shells, p. 85. 



A very distinct coral-red species, with white tipped apex and 

 white umbilical crescent. The following seems to be a variety. 



Var. RUBROFLAMMULATA Pilsbry. PL 2, figs. 1, 2. 



Shell with the same sculpture and form ; umbilicus quite evident ; 

 whorls of the spire minutely plicate just above the sutures; color 

 white, with large, irregular red tracts or spots below the periphery. 



Alt. 4, diam. 5 mill. 



St. Thomas. 



This beautiful color-variety is very variable in markings. The 

 figures represent the most usual pattern. Other shells have large 

 irregular radiating flames above the periphery, which under a lens 

 are seen to be of an olivaceous tint, veined and dotted throughout 

 with red ; the base closely red-articulated. Another specimen is 



