THE CANCROID CRABS OP AMERICA 511 



Chelipeds very unequal; wrists tuberculate or granulate; major 

 palm very swollen and with numerous pearl-shaped tubercles above, 

 which disappear on the outer face; minor palm rather deep, spinous 

 above and outside. Ambulatory legs without spines. 



Measurements. — Female cotype, length of carapace 9.3, width of 

 same including spines 13.2, excluding spines 12.2 mm. 



Range . — Antilles . 



Material examined. — Antilles; Freminville collector; 2 dried speci- 

 mens, the larger a female (Paris Museum). 



PILUMNUS LACTEUS Stimpson 



Plate 205, Figures 1 and 2 



Pilumnus ladeus Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 142 (type- 

 localities, reef at Cruz del Padre, Cuba, and at Key West in from 2 to 5 

 fathoms; types not extant). — Not Milne Edwards, Crust. R6g. Mex., 

 1880, p. 292, pi. 51, fig. 5-56. 



Diagnosis. — Covered with an uneven velvet, concealing tubercles. 

 Tubercles few and small. Four lateral teeth. More than half of 

 outer surface of major and minor manus bare and smooth. 



Description. — Covered with a very short velvet like pubescence 

 easily rubbed off. Tubercles of carapace and chelipeds not numerous, 

 invisible through the hairy coating. Carapace widest at last tooth; 

 nearly smooth, a row of five low tubercles parallels the antero-lateral 

 and orbital margins ; a few tubercles on epigastric region, a few very 

 obscure on hinder part of protogastric lobe, not more than one on 

 mesogastric region. Lobes of front triangular, edge granulate. 

 Inferior margin of orbit granulate, two granules on superior margin. 

 Antero-lateral teeth four, subcorneal, with sharp horny tips, the first 

 or orbital tooth very short, tips of second and third curved forward. 



Two similar curved spines at distal end of upper margin of merus 

 of cheliped. Scattered tubercles on carpus, a short blunt tooth at 

 inner angle. Outer surface of hands largely smooth and glabrous; 

 the tubercles and hairy coating of the major palm cover only the 

 extreme proximal end of the outer surface together with the upper 

 surface, or it may be only the proximal end of the same, and form an 

 oblique line with the smooth area. The rough hairy part of the 

 minor palm is more extensive than on the major palm. In both 

 palms the tubercles have a tendency to spread further than the hair, 

 encroaching on the glabrous space. On the ambulatories the pubes- 

 cence is supplemented by long slender hairs on the margin. 



Color. — Pubescence whitish or cream-color. Outer surface of hands 

 light red, (Stimpson.) 



Measurements. — Male (17902) entire length of carapace 8, entire 

 width of same 11.5, fronto-orbital width 7.7, width of front 3.7 mm. 



Range. — North Carolina; west coast of Florida; Cuba. 



Material examined. — See table, page 512. 



