68 EEPORT ON A COLLECTION FROM 



further forward than the short spine at the extremity of the external margin. The 

 shortest of the three antennular flagella is distinctly serrate and exceeds the free end of 

 the antennal scales hy its whole length. The external maxillipedes project with their 

 terminal joint beyond the peduncles of the outer antennoe. 



The iirst pair of legs exceed, in the full-grown male, the antennal scales hy two fifth 

 parts of their carpus ; the latter is once and two-thirds as long as the hand, the fingers 

 very slightly longer than the palm. 



The second legs are considerably stouter and longer than the first and somewhat 

 unequal. In the largest male, which is 54 niillira. long, both legs (PL 6. figs. 5 & 6) are 

 slightly longer than the body and both exceed the antennal scales by the whole length 

 of the carpus. The cylindrical merus widens slightly towards its distal end. The 

 carpus of both legs appears at first sight just as long as the merus, but measured exactly 

 it appears always very slightly longer than it. The carpus, quite narrow at base and 

 here much narrower than the distal end of the preceding joint, regularly widens towards 

 its distal extremity, so that it has a conical shape and its diameter at the distal end is a 

 little broader than that of the merus. The carpus appears, therefore, tioo and a half to 

 three times as loncj as thick at its distal extremity. The chela is two and a half times as 

 long as the oarpiis, and in both legs the pahn measures almost two-thirds the length of the 

 whole hand. The palm of the larger chela is distinctly broader than the widened distal 

 end of the carpus, being a little more than once and a half as broad ; the palm is about 

 three times as long as broad, and its width measures almost one-fourth the length of the 

 whole hand. The palmar portion of the hand appears .^lightly broader than thick, the 

 proportion being as 6 : 5 ; it is everywhere rounded both on tlie upper and lower surface 

 and on the sides. When the cliela is looked at from above, the outer margin of the palm 

 appears straight, but the inner slightly convex, and the inner border of the chela is a 

 little concave at the base of the fingers. The j^ointed fingers leave, when closed, a 

 narrow interspace between them, in the middle about as broad as the fingers thenaselves ; 

 the latter are almost cylindrical. The immobile finger is nearly straight and tapers but 

 very slightly towards the tij) ; the dactylus, however, is somewhat curved and tapers 

 more regularly. Each finger is armed with a strong conical tooth ; that of the index is 

 2)iaced just in the middle of tlie finger, that of tlie dactylus a little beyond it; three 

 much smaller obtuse teeth are observed between each conical tooth and the articulation, 

 and the third of these small teeth is double. On each finger a sharp cutting-edge runs 

 between the conical tooth and the tip. 



The smaller chela (fig. 6) bears a close resemblance to the other, but the diS'erence 

 between its width and its height or thickness is still smaller, so that the palm appears 

 almost cylindrical and but slightly broader than the carpus. The fingers are regularly 

 tapering, the dactylus is less curved, and the interspace l>etween both is small, only half 

 as broad in the middle as the fingers. The toothing is about the same, but the dactylus 

 bears six small obtuse teeth between the large conical tooth and the articulation. 



In the younger individuals the fingers are comparatively longer, so in a young male, 

 long. 36 mm., the palm is 4^ mm , the fingers 4 mm. long ; the former. If mm. broad, 

 is three times l)roader than long and 1 mm. thick. 



