DECAPOD CRUSTACEANS OF THE BEAUFORT, N. C, REGION. 



413 



long as eyestalks. Antennal peduncle a little shorter than that of antennule, its basal article with a 



small lateral spine curved dovraward and forward, its second article with a spine on the inner distal 



angle and several spinules on the inner side of the outer distal prolongation; acicle curved; flagellum 



slender, longer than the body. Chelipeds hairy; meros and carpus nearly smooth except for a few 



spines along the margins, chelae with the entire upper surface spinulose, the spinules being placed 



quite close to one another and each with 



a cluster of stiff hairs at the base on the 



distal side; the right cheliped is much 



larger than the left and its hand has the 



finger and palm of about equal lengths; in 



the left hand the finger is about four times 



as long as the palm and when closed meets 



the thumb for only a short distance near 



the tip. 



Length: About 29 mm.; carapace, 

 II mm. 



Two specimens of this hermit crab 

 were dredged by the Fish Hawk from the 

 margin of the Gulf Stream at a point 30 

 miles south of Cape Lookout Lightship. 

 The species is most closely related to P. 

 bouvieri (Fax) [=smithii Milne-Edwards 

 and Bouvier] from which it difTers, how 

 ever, in the spines on the antennal pedun- 

 cle, the length of the movable linger as 

 compared with the palm of the small hand and the gaping fingers. 



Fig. 16. — PaguTus cokeri, type, 9 X4K. 



a, Dorsal view of carapace and frontalappendages, the basal articles of 

 the antenDules considerably foreshortened; b, right chela; c, left chela. 



The species has been named in 

 honor of Dr. R. E. Coker, of the Bureau of Fisheries, one time biologist of the North Carolina Geolog- 

 ical Survey at Beaufort, and a contributor to the literattu-e on the fauna of the region. 



Genus PYIOPAGURUS A. Milne-Edwards and Bouvier. 



Pylopagurus A. Milne-Edwards and Bouvier, 1893, p. 74. 



Pylopagurus rosaceus A. Milne-Edwards and Bouvier. PI. xxx, fig. 5. 



Pylopagurus rosaceus A. Milne-Edwards and Bouvier, 1893, p. 74. 



Anterior division of carapace about as long as broad, its anterior margin with three projections, the 

 median one (rostrum) obtuse and slightly advanced beyond the lateral ones, which terminate in a 

 minute spine; sides of dorsal surface and anterior margin with a few tufts of setae. Eyestalks stout, 

 considerably shorter than the anterior division of the carapace, distinctly dilated at the distal end and 

 with three or four pencils of setae in line along the upper surface, eye scale small, its tip acute. Antennal 

 peduncle extending beyond the eye, flagellum slender and longer than the body, acicle strongly ciu^'ed. 

 Right cheliped very much larger than the left; chelae in both hands capable of being bent down at a 

 right angle to the carpus so as to form, either singly or together, an operculum to close the orifice of the 

 cavity inhabited by the crab; both margins of large chela and outer margin of small one armed with a 

 row of close-set conical teeth and the upper surface of both covered with closely crowded rosettelike 

 tubercles each of which consist of a central larger tubercle surrounded by a number of smaller ones. 

 Walking legs of medium length, the first and second on the left side and the second on the right side 

 exceeding the large chela. 



Length of a male, about 24 mm., carapace, g mm. 



Two specimens of this hermit crab were obtained by the Fish Hawk in 1915 from the margin of the 

 Gulf Stream about 30 miles south of Cape Lookout Lightship. 



69571°— 18 — -27 



