CARCINOLOGICAL STUDIES. 251 



though I must remark that a slight trace of an epibran- 

 chial tooth is seeu in the larger individuals a little behind 

 the acute external orbital angles. The epistome is some- 

 what granular. The second joint of the outer foot-jaws is 

 longitudinally furrowed in the middle and the third joint 

 is oval. The lobe at the infero-internal angle of the orbits 

 is small. The abdomen of the male (fig. 4^) resembles 

 that of Ses. intermedia de Haan (Fauna japon. PI. XVI , 

 fig. 5); the terminal joint is short, being a little broader 

 at its base than it is long; the penultimate segment is 

 not quite three times as broad at its posterior 

 margin as it is long and has convex rounded lateral 

 margins; the following segments gradually decrease in 

 length. The terminal segment of the abdomen of the fe- 

 male is profoundly pushed into the preceding. Sternum 

 and abdomen are a little punctate, but for the rest quite 

 smooth. 



The anterior legs of the largest male individual are little 

 more than once and a half as long as the cephalothorax. 

 The anterior margin of the arm, the outer surface of 

 which is transversely rugose , is granulated , but for the 

 rest unarmed; the upper margin is also unarmed, but 

 the granulated infero-external margin is notched before its 

 distal end , so that it terminates into a tooth before that 

 incision. The wrist, granular and rugose above, is unar- 

 med at its internal angle. The hands (fig. 4^ , 4^) 

 are stout, the fingers once and a half as long as the palm. 

 The convex outer surface of the palm is finely granula- 

 ted , the inner surface is also slightly granular , but bears 

 no transverse crest or ridge of prominent gra- 

 nules; the upper surface of the palm is granular like the 

 outer surface , but presents no pectinated ridges or crests. 

 Highly characteristic are the fingers of the adult male. The 

 mobile finger is namely extraordinarily enlarged 

 along its proximal half, rather rapidly taper- 

 ing about the middle towards the tip; the 

 upper surface of the enlarged proximal part 



Notes from the Leyden IMEueeum , Vol. XIV. 



