DECAPOD CRUSTACEANS OF THE BEAUFORT, N. C, REGION. 409 



6. Paired appendages present on the first two abdominal segments of the male and the first segment 



of the female Paguristes. 



bb. No paired appendages on the first abdominal segment of either sex. 



c. Fingers of chelipeds opening and closing horizontally Clibanarius. 



cc. Fingers opening and closing obliquely or nearly vertically Petrochirus. 



aa. External maxillipeds widely separated at base by a sternum; right cheliped usually much 

 larger than the left, the left never larger than the right; occasionally they are subequal 



(Subfamily Pagurince). 

 b. Fingers opening and closing obliquely; vas deferens not protruding; first abdominal segment of 



female only with a pair of appendages Pylopagurus. 



bb. Fingers opening and closing horizontally; first abdominal segment without paired appendages in 

 either sex. 



c. Vas deferens not protruding in the form of a tube Pagurus. 



cc. Vas deferens produced on the right side only into a tube which recurves over onto the dorsum 

 of the abdomen Catapagurus. 



Genus PAGURISTES Dana. 



Paguristes Dana, 1852, p. 436; ibid., 1852, p. 269. 



KEY TO THE SPECIES OF THE BEAUFORT REGION. 



a. Anterior portion of carapace wider than long, carpus and hands rather thickly covered with long, 



soft hair moorei. 



aa. Anterior portion of carapace longer than wide, carpus and hands with scattered short hairs. . armatus. 



Paguristes moorei Benedict. PI. xxx, fig. 3. 



Poffurisies moorei Benedict, 1901, p. 144, pi. 4, fig. 3. 



Anterior division of carapace broader than long, its anterior margin with three projections — a rounded 

 median one (rostrum) and a pair of slightly more advanced and more acute lateral ones; upper surface 

 with a few scattered hairs and more or less iridescent. Eyestalks almost parallel sided, slightly dilated 

 at the corneal end, straight or slightly curved outward; scale small, blunt-tipped. Antennal peduncle 

 extending slightly beyond middle of eyestalk ; flagellum short, not exceeding the tips of the legs. Anten- 

 nulary peduncle not quite reaching the end of the eyestalk. Chelipeds subequal in size and of similar 

 form, the chelae short and thick; upper surface of carpus and hand with a covering of long, soft hair, 

 which almost hides the spinules and sharp tubercles beneath; inner superior margin of hand with a 

 row of five small, stout spines; carpus with two rows and meros with one row of spines above. First 

 pair of walking legs with a row of spines along the upper margin of the carpus and propodus. 



Length, 13 mm.; carapace, 5 mm. 



Color, yellowish, the eyestalks deep orange or crimson below and white above. 



A single small specimen of this species was brought in by the Fish Hawh in 1915 from the margin 

 of the Gulf Stream about 30 miles due south of the Cape Lookout Lightship. 



Paguristes armatus Hay. PI. xxx, fig. 7. 



Paguristes armatus Hay, 1917. p. 73. 



Anterior division of carapace considerably longer than wide, its front margin thickened and drawn 



out into an almost straight-sided, acute rostrum whose tip considerably exceeds the rather obtuse lateral 

 projections. Eyestalks considerably longer than greatest width, but not quite equal to the length of the 

 anterior division of the carapace, nearly straight and not much enlarged distally ; scale acute. Peduncle 

 of antennule slightly longer than eyestalk. Peduncle of antenna about two-thirds as long as eyestalk; 

 acicle straight, spinulose from base to tip. Chelipeds not very unlike in size, and similar in form, short, 

 thick; meros, with a few spines distally; carpus and hand covered with strong, sharp-pointed, conical 

 tubercles, of which those on the upper margin of the movable finger, palm, and carpus are larger than the 

 others. Carpus and propodus and to some extent the dactyli of the first pair of walking legs spinulose 

 along the upper and lower margins. 



Length, about 20 mm.; carapace, 8.5 mm. 



