CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 8l 



dirty orange color, mottled with red. Pincers tipped with ma- 

 hogany. 



Very common in the vicinity of Hongkong, China, on mudd\' bot- 

 toms, in 6 to 20 fathoms. 



120. CHARYBDIS VARIEGATA De Haan 



Pi,ATK IX, Fig. 7 

 Charybdis variegata De Haan, Fauna Japonica, Crust., p. 42, pi. i, fig. 2. 



Our specimens agree very well with the species to which they are 

 here referred, although much better with the figure than with the 

 description of De Haan. There are some differences, however, 

 which it is important to mention. The four median teeth of the 

 front in our specimens are sufficiently well separated from the 

 others ; in C. variegata they are said not to be so separated.- The 

 hand is conspicuously rugose with transverse ridges (squamose), a 

 character not mentioned in De Haan's diagnosis. And the antero- 

 lateral margin is rather more convex than is represented in the 

 figure. 



The frontal teeth are not "aigues et egalement espacees," as in 

 Thalaiiiifa calliaiiassa Milne Edwards (non Cancer calliaiiassa 

 Herbst). 



Several specimens were dredged in the northern part of the China 

 Sea. 



121. CHARYBDIS SEXDENTATA ^ (Herbst) De Haan 



Cancer scxdciitatus Herbst, Naturg. dcr Krabben und Krebse, pi. 7, lig. 52. 

 Thalainita sexdentata R ppei.l, Krabben des rotben Meeres, p. 4, pi. i, 



fig. I. 

 Charybdis sexdentata De Haak, Fauna Japonica, Crust., p. 41, pi. xn, 

 fig. I. 

 Easily distinguished by its sharp frontal and antero-lateral teeth, 

 the posterior one of which is considerably more projecting than the 

 others. Some specimens are glossy and others pubescent. In the 

 glossy specimens the hands are also naked and the costa: ungranu- 

 lated. The color is deep green. 



In our specimens the incisions separating the mitldlc four teeth 

 from the others are a little deeper than the other frontal notches, 

 and the penult joint of the natatory feet is always conspicuously 

 spinulose along the inferior edge. 



Found among rocks and stones on coarse, sandy ground, at and 

 near low-water mark, in a bay near Hongkong, China. 



^ Charybdis japonica (A. Milne Edwards). 



