52 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. xxxir. 



margin furnished with three or four fascicles of spines; palm very 

 oblique, slightly convex, with a nan-ow lamellar edge furnished on 

 each side with a row of about twentj^-four bifurcate spines, two or 

 three of which extend upon the posterior margin; dactyl stout and 

 strongly curved. 



In the second gnathopods of the male the propodus is about equal 

 in size to that of the first pair, but with the palm less obli([ue and the 

 posterior margin correspondingly longer. 



First uropods extend to the tips of the second pair, the peduncle 

 slightl\' longer than the two rami; second uropods al)out two-thirds 



Fig. 14. — Stygonectes flagellatus, male. San Makcos, Texas. The rudimentary inner ramus 

 of the third uropod was broken in the specimen drawn. 



as long as the first ones; the first and second pairs reaching far beyond 

 the third pair (in Eucrangonyx m.ucronatun they extend only slightly 

 beyond the tip of the third pair); terminal uropods very small, about 

 two-thirds as long as the peduncle of the second pair; inner ramus 

 rudimentary; the outer one about as long as the peduncle and fur- 

 nished distally with a few spines. Telson entire, about three times as 

 long as broad at the base, tapering slightly to the distal end, which is 

 subtruncate; furnished with several spines at the tip and four or five 

 spines on the lateral margins. 



