S. I. Smith on Brazilian Crustacea. 21 



lines of five small spines each. On the median line of the anterior 

 part of the gastric region there are three small, sharp spines. The 

 remaining spines of the carapax are disposed irregularly. 



The peduncle of the antennula extends slightly beyond the pedun- 

 cle of the antenna ; the basal segments are armed with short setse. 

 The inner flagellum is about as long as the carapax, quite slender and 

 wholly naked ; the outer flagellum is shorter, much stouter, and the 

 terminal portion ciliated beneath. 



The peduncle of the antenna is a little longer than the breadth of 

 the carapax, and is armed with stout spines, three of which are on the 

 anterior edge of the basis, and another on the inner side, below and 

 near the outer of the three spiniform teeth of the anterior edge of the 

 epistome. The flagellum is about three times as long as the carapax, 

 tapers to a slender j^oint, and is armed with sharp spines. 



The external maxillipeds, when extended, reach nearly to the an- 

 terior extremity of the basis of the antennae, and all the segments are 

 thickly clothed on the inside, and the dactylus all round, with stiff 

 hairs ; the exognath is rudimentary, about half as long as the dactylus 

 of the endognath, quite slender, and is wholly without a flagellum. 



The thoracic legs are smooth and naked, except the dactyli and the 

 outer portion of the under side of the propodi ; the meral segments 

 are each armed with two sharp spines, one al)ove and another on the 

 inside at the extremity next the articulation with the carpus. The legs 

 of the first pair are shorter than the others, do not reach quite as far 

 forward as those of the second pair, and the dactyli are stout and 

 thick. Those of the second and third pairs are more slender than the 

 others, especially the penultimate segments, the dactyli straight 

 nearly to the tips, which are hooked abruptly down. The third pair 

 reach slightly beyond the second. The fourth pair extend only to the 

 middle of the propodi of the third pair ; the carpus is armed with a 

 stout and sharp spine on the upper edge of the extremity next the 

 propodus, where there is no spine in the other legs ; the dactylus is 

 stout, the basal portion armed beneath with slender spines, which are 

 articulated at the base and movable, and the terminal portion taper- 

 ing to a slender point and curved evenly downward. The legs of 

 the fifth pair reach to the middle of the propodi of the fourth ; the 

 coxa is armed with a long, sharp spine on the posterior side and near 

 the articulation with the basis ; the dactylus in the male is similar to 

 that in the fourth pair, but shorter and more curved ; in the female 

 the dactylus is somewhat shorter than in the male, and armed on the 

 posterior side of the base with a stout process which closes against a 



