CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 195 



dilatation, broadest toward the hand ; hand thick, short-ciUated ex- 

 teriorly, and with a few hairs about the middle within ; fingers short, 

 slightly unidentate within, tips curved; dactylus shorter than the 

 immovable finger. Ambulatory feet slender, naked; one or two 

 small spinules on the inferior edge of the penult joint ; dactyli with 

 one or two minute unguicles besides the principal one. In life this 

 species is of a clear, pale bluish-gray color, with large spots of a 

 neutral tint or sepia color. Length of the carapax in the male, 

 0.15 ; breadth, 0.2; length of the larger cheliped. 0.52 inch. 



It was dredged from a bottom of shelly sand in twenty-six fath- 

 oms, in the China Sea. under the twenty-third parallel of north 

 latitude. 



Genus RE:\IIPES Latreille 



303. REMIPES TESTUDINARIUS ' Latreille 



Plate XIX, Fig. i 



Reiiiipes tcstudinarius Latreille, Gen. Crust, et Ins., v, i, p. 45. Milne 

 Edwards, lllust. Cuv. R. A.. Crust., pi. xlii, fig. i. 



Our specimens are broad and depressed, with a single row of 

 ciliated pits or impressed lineolse along the postero-lateral margin. 

 Color above bluish-gray, minutely clouded ; below white. We figure 

 one of our specimens, in order to indicate with more certainty the 

 species we have in hand, which we cannot certainly identify with 

 R. tcstudinarius, a species known to us only from the descriptions 

 and figures of European authors, who do not always agree in their 

 statements with regard to it. The figure in the "Regne Animal," 

 referred to above, is a good representation of the largest of our speci- 

 mens. But Milne Edwards gives Australia as the habitat of the 

 species. 



The expedition specimens were found on the sandy shore of a bay 

 on the eastern side of the island of Ousima. 



Genus MASTIGOPUS Stimpson 



This genus is remarkable for the form of its anterior feet (for 

 which the name chelipeds would here be inapplicable), which re- 

 semble more antennae than feet, as seen in other genera of Deca- 

 poda. It is allied to Remipes in form and general character, but the 

 body is more slender. The carapax is elongated and toothed at the 



^ Hippa adactyla Fabricius. 



