494 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Range. — North and South Carolina. From Gulf of Mexico to 

 Florianopolis [Desterro], Brazil. Shallow water to 11 fathoms. 

 A. Milne Edwards records vinaceus from 37 fathoms in the Gulf of 

 Mexico. 



Material examined. — See table, pages 495-498. 



PILUMNUS SPINOSISSIMUS Rathbun 



Plate 200, Figures 7 and 8 



Pilvmnus spinosissimus Rathbtjn, Bull. Labor. Nat. Hist. State Univ. Iowa, 

 vol. 4, 1898, p. 265, pi. 5, fig. 3 (type-locality, ofif Key West, 5>i fathoms; 

 type in Mus. State Univ. Iowa). 



Diagnosis. — Long-hairy. Frontal lobes oblique. Three innermost 

 orbital spines curving over eyestalk. Four long antero-lateral 

 spines. Palms short and high. 



Description. — Carapace anteriorly strongly deflexed, front half 

 covered with spiniform granules and rather sparse long hairs; posterior 



Figure 79.— Pilumnus spinosissimus, male, type, dorsal view, X 3 



half almost smooth; regions deeply limited. Front bilobed; lobes 

 separated by a broad U-shaped sinus; each lobe has an oblique 

 margin armed at inner end with a short spine and a few minute 

 spinules; at outer end of front a small isolated or antennal spine. 

 Superior orbital margin armed with four long spines, two innermost 

 curving over the orbit but in planes at right angles to each other; 

 inferior margin armed with a large inner process with bispinose tip 

 and two shorter spines between which there is a row of stout spinules* 

 Lateral margin of carapace w th three long spines beside orbital 

 sp ne; posterior spine a little shorter. 



Chelipeds: Two long curved spines at distal end of upper margin 

 of arm; wrist armed with about 20 sharp spines directed distad. 

 Approximately two-thirds of outer surface of larger hand of ma'e 

 covered with about seven irregular rows of spines, larger above, 



