CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 71 



and covering the deeply concave postero-lateral slopes of the cara- 

 pax. The outline of the postero-lateral margin is so deeply concave 

 as to form nearly a right angle at the middle. Some other species 

 of the genus, as P. globosus Dana, exhibit similar characters, but 

 none in so great a degree. 



Carapax strongly convex, transverse ; proportion of length to 

 breadth, 1:1.32. Surface rather deeply areolate ; areolets granu- 

 lated and pubescent. Antero-lateral margin four-toothed (the angle 

 of the orbit included) ; teeth equal, with sharp tips and denticulated 

 margins. The furrows separating the teeth are continued inferiorly 

 for some little distance on the subbranchial region. Median lobes 

 of front rather prominent, equally rounded. Chelopoda large, un- 

 equal, minutely pubescent above, that on the left side smaller : hand 

 granulated above on the outer side and on the inner inferior edge, 

 the granules sharply projecting. Carpus with scattered granules, 

 smallest and most crowded on a ridge around the outer base of the 

 hand, within which there is a smooth parallel groove. Ambulatorv 

 feet rather short and broad, pubescent and hair}- above, nearly 

 smooth below. Abdomen and sternum of male pubescent. 



Color of carapax obscured by the pubescence ; reddish-brown, 

 with darker spots. Dimensions of a male: Length of carapax, 0.41 ; 

 breadth, 0.54 inch. 



Dredged from a shelly bottom, in 10 fathoms, in the harbor of 

 Hongkong, China. 



Genus RUPPEUJ.V Milne Edwards 

 98. RUPPELLIA ANNULIPES' Milne Edwards 



Riif^fcllia aiuinlipes Milne Edwards, Hist. Nat. des Crust., i, 422. D.\na, 

 U. S. Exploring Expedition, Crust., i, 246, pi. xi, iig. 4. 



Our specimens agree perfectly with those of Dana. There is little 

 doubt of their being the same as those of Milne Edwards, not- 

 withstanding the absence of a distinct "crete horizontale" on the 

 teeth of the antero-lateral margins. The dimensions of the single 

 specimen in our collection, a female, are, length of carapax, 0.6: 

 breadth, 0.94 inch. 



It was taken at Great Loo Choo Island. 



Genus ER1PHL\ Latreille 



The "red-eves," as our seamen called the crabs of this genus, 

 live in crevices of the rocks above low-w^ater mark, where they seem 



' Lydia annulipcs (Milne Edwards). 



