I9I7-J 



S. Kemp : Notes on Crustacea Decapoda. 



269 



Hht. 18. — Hymenicoides carteri, sp. no\'. 

 Chela of large male, external view. 



except for a small portion at the base of the stalk, is entirely con- 

 cealed from view. 



The chelipedes are greatly swollen in both sexes ; the chelae 



of the male are much larger than those of the female. The outer 



border of the merus 



bears a conspicuous 



tooth in front of its 



middle point. On the 



inner side of the carpus 



there is a longitudinal 



ridge which is furnished 



with a fringe of long 



hairs. The chela of the 



male (text-fig. 18) is 



less than one and a 



half times as long as 



high. There are sharp 



keels on both upper 



and lower borders of the palm, the latter being continued to the 



tip of the immobile finger. These keels like that on the carpus 



are fringed with long hairs. The inner surface of the palm is con- 

 vex and the outer face bears a huge protuberance (text-fig. 19), 



only well developed in very large males, which culminates in a 



short crest not far 

 form the finger cleft. 

 The fingers are stout 

 and in large individuals 

 meet only at the tips. 

 The dactylus bears two 

 large blunt teeth in its 

 basal half and the fixed 

 finger two smaller ones 

 placed just behind 

 them; nearer the tip 

 each finger bears four 



or five teeth. The dactylus is fully one and a half times the length 



of the upper border of the palm and is obscurely ridged dorsally. 



The chela of the female is similar to that of the male, but is more 



slender and shows practically no 



trace of the large protuberance 



on the palm. Except for the 



fringes of hair already mentioned 



the chelipede bears only a few fine 



and scattered setae. 



The second walking legs are a 



little longer than the first and 



third and are about three times 



the length of the carapace; the last pair is only two-thirds the 



length of the second. The anterior border of the merus in all four 



pairs terminates in a blunt tooth. The dactyli are slender and 



Fig. 19. — Hy)sieiiicuides carteri, sp. nox 

 Chela of large male, dorsal view. 



Fig. 20. — Hymenicoides carteri, 



sp. nov. 



Dactylus of penultimate walking leg. 



