440 BULLETIN OF THE BUREAU OF FISHERIES. 



distal margin of the other leg articles light yellow; tubercles of the upper half of the chelipeds dark blue; 

 of the lower half, yellow; lower surface of chelipeds and body white; fingers brown. 



Four specimens of this gayly colored crab, all immature males, were collected in August, 1915, from 

 the jetties on Shackleford Bank. They were found under flat rocks while search was being made for 

 Pachygrapsus iransvers'us and Eurypanopens depressus' but appeared to prefer situations a little higher 

 above the water than the other two species. One individual contained an isopod parasite (probably 

 Leidya distorta) in its branchial chamber. 



Eripkia gonagra has not been reported heretofore on oui coast north of South Carolina. Verrill and 

 others have collected it at Bermuda. It is common from the Florida Keys to Brazil and probably 

 throughout the Bahamas and West Indies. 



Genus PILUMNUS Leach. 



Pilutnnus Leach, iSis, p. 309, 321. 



KEY TO THE SPEaES OF THE BEAUFORT REGION. 



a. Hand with numerous acute black spines sayi. 



aa. Hand without spines lacteits. 



Pilunmus sayi Rathbun. Hairy crab. PI. xxxv, fig. 4. 



Cancer aculeatus Say, z8i8, p. 449. 



Pilumnus actdeaius Gufirin-Meneville. 1828; pi. in, fig. 2; H. Milnc-Edwards, 1834-1840, 1. 1, p. 420; Coues, 1871, p. 120. 



Pilumnus sayi Rathbun, 1897, p. 15. 



Carapace about three-fourths as long as wide, sparsely covered with long filiform and plumose hairs 

 and with about six blackish, acute, nearly erect spines on each side; front depressed, emarginate in 

 the center, obsciu-ely so on each side and with four or five spines on each side; superior and inferior 

 orbital walls with marginal spines. 



Superior surfaces of chelipeds and ambulatory legs with many filiform and plumose hairs, the carpal 

 and propodal articles being most thickly covered and having several strong spines as well. Chelipeds 

 large, unequal ; carpus with 15 or 20 erect black spines; spines of hand strong and acute above but becom- 

 ing smaller on the external face; fingers ribbed, black and with obtuse teeth, the movable finger spiny 

 above at base. 



Length, 22 mm.; width, 29 mm. 



Color, grayish bro^vn irregularly suffused with red; spines mostly black, and the hairs yellow. 



This crab which is easily distinguished from all the others in the region, is fairly common on the 

 shelly bottoms of all the channels of the harbor and is not infrequently found crawling about over the 

 wharf piles about the towTi front. It also occurs rather abundantly on the Blackfish Banks. 



Pilunmus lacteus Stimpson. Small hairy crab. PI. xxxv, fig. 3. 



Pilumnus lactcus SWm^son, 1871, p. 142. 



Carapace about three-fourths as long as wide and with tufts of plumose hairs on the anterior and 

 scattered single hairs on the posterior parts; anterolateral margins with iovn anteriorly directed teeth 

 which increase in size from before backwards; front depressed, deeply notched iu the middle and with a 

 smaller notch near the eye ; orbital margins with small tubercles but without well developed spines. 



Chelipeds dissimilar in size but otherwise practically alike, stout, setose and plumose-hairy, and 

 somewhat tuberculate above, but naked and polished below and on the ventral half or two-thirds of 

 both the inner and outer surfaces of the chela; there is a row of small spines on the inner part of the 

 distal margin of the carpus. Ambulatory legs hairy and plumose but without spines. 



Length of a male : 11.5 mm.; width, 15.25 mm. 

 • Color, gray or pinkish, the plumose hairs whitish or cream-colored, hands and tips of legs light red. 



This species is much rarer at Beaufort than P. sayi but may usually be found, if careful search is 

 made, on the wharf piles about the town. It is rarely taken by dredging in the harbor and has only 

 once been found in the material brought in by the Fish Hawk from outside. 



