CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION I77 



the external maxillipeds the palpus is inserted at the internal angle 

 of the meros, the anterior margin of which is consequently trans- 

 verse. The feet are of moderate size, with the meros- joint not 

 dilated ; fingers of the first pair with calcareous apices. The feet of 

 the posterior two pairs are smaller and shorter than the rest, though 

 about equaling each other in length. They have subcheliform ex- 

 tremities, the penult joint being armed with a spiniform process 

 nearly as long as the minute sharp dactylus. The abdomen is un- 

 armed; that of the male is rather narrow, with its penult joint con- 

 tracted, appendages conspicuous. 



The species are of large size, and the adult individuals do not 

 appear to carry about with them any protecting body. 



Found in the warmer seas of both oceans. Type, D. vulgaris. 



283. DROMIA RUMPHII' Fabricius 



Plate XXI, Fig. 7 



Cancer droiiiia Linn^us (?). 



Droiiiia riuitpliii F.\bricius, Suppl., 359. Milne Edw.vrds, Hist. Nat. des 

 Crust., II, 174. 



This large species is common on muddy bottoms in from four to 

 ten fathoms in the harbor of Hongkong, China. In one of our speci- 

 mens, a male, the carapax measures 3.4 inches in length and 4.05 

 inches in breadth. It is everywhere covered with a thick coat of 

 short dark-brown hairs or bristles. The carapax beneath this coat 

 is reddish. Fingers bare, red. 



In De Haan's figure of this species (Fauna Jap., Crust., pi. xx.xii ) 

 the penult joint of the male abdomen is represented of about the 

 same breadth as the fifth and seventh, while in our examples it is 

 considerably narrower. The first and second ambulatory feet are 

 also shorter than he has figured them. 



Genus PSia'DUDKUMi A Slini])s..n 



The cara])ax is narrow, much longer than broad, convex, and 

 pubescent. In the specimen upon which the genus is founded the 

 shell is hut little indurated posteriorly. The facial region is more 

 than half as wide as the carapax. Front triangular, very ]iromi- 

 nent, almost rostriform. The epistome or interantennulary triangle 

 is not soldered to the front as in allied genera. Palate armed with 



^ Dromia doniiia ( Liniu'Eus'). 

 12 



