392 DE. J. G. DE MAN OX CRUSTACEA. CllIEFLT 



The cejihalothorax is 13'5 mm. long, measured in the middle line, the abdomen 

 excluded ; the external orbital angles are 10'75 mm. distant, and the tips of the large 

 lateral spines BOS mm. The lateral angles of the posterior margin ai*e spiniform. 

 Penultimate joint of the abdomen 3 mm. long, its posterior margin straight, 2 mm. 

 broad. 



In both chelipeds the anterior border of the arm carries 4 spines ; the right cheliped 

 is a little larger than the left, the arms project nearly their Avhole length beyond the 

 carapace. 



The tip of the dactylus of the last pair of legs shows no trace at all of a dark fleck. 



PLATYGRAPSUS, Stimpson. 

 Plattgbapsus depkessus (de Haan). 



Grapsiis [Platynotus) depressus, de Haan, Fauna Japonica, Crust. 1835, p. 63, tab. 8. fig. 3. 

 Platygrapsus depressus, Ortmann, in Spengel, Zool. Jalirb., Syst. vii. 1894, p. 716. 



One male of medium size from the Inland Sea of Japan, caught in deep water. 



This specimen, which has been compared with an adult typical male from the Leyden 

 Museum, is 14 25 mm. broad and 12 mm. long ; breadth of the anterior border of the 

 Iront 6'6 mm. The right cheliped is much larger than the left, in both the inner angle 

 of the carpus is subacute ; the fingers of the right cheliped, which is just as long as the 

 carapace, viz. 12 mm., are gaping and meet only at the tips ; the arcuate and tapering 

 dactylus carries a denticulate prominence in the middle, and between it and the tip six 

 or seven small rounded teeth ; the inner border of the lower finger carries also seven or 

 eight small, somewhat unequal teeth. The smooth outer surface of the chela is finely 

 punctate. The fingers of the other chela, which is 9*5 mm. long, are just as long as 

 tlie palm, straight and shut almost close together; the cutting-edge of the immobile 

 finger shows a dozen somewhat unequal conical teeth ; as many teeth occur on the 

 dactylus, but here they are very small, those near the ti^) being a little larger than 

 the rest. 



The legs are of a beautiful scarlet colour ; the upper surface of the carapace is greenish, 

 but the front and the antero-lateral margins are also red. 



ASTHENOGNATHUS, Stimpson. 



AsTHENOGNATHUS IN^QTJIPES, Stimpson. (PL 31. figs. 4-6.) 

 Asihenognathus inaqidpes, Stimpson, iu Proc. Acad. Nat. Sciences Philadelphia, 1858, p. 107. 



One egg-laden female from the Inland Sea of Japan, caught in deep water. 



So far as I am aware, this species has not been found again since its first discovery almost 

 half a century ago. It is a little smaller than Stimpson's type, also a female, the carapace 

 of which was 6"8 mm. long and 95 mm. broad. The carapace of our specimen from the 

 Inland Sea is 4'S mm. long, measured in the middle line ; the well-defined and granular 

 antero lateral borders are slightly arched, diverging backward, and they meet with the 



