126 



slender, cylindrical, and the entire length of its upper border closely set 

 with short, equidistant hairs, curled at their tips; third and fourth joints 

 short, subequal, about one-quarter the length of the second, a few hairs 

 on their upper surface ; flagellum linear-lanceolate, in length almost 

 equal to the second joint of the base, uniarticulate, pointed, with seven 

 or eight slight serrations along the superior edge, one or more hairs at 

 each serration. The second joint is directed upward and outward, and 

 the third, fourth, and flagellum are bent downward, nearly at a right 

 angle with the second. When the animal is at rest, the inferior anten- 

 nas are evidently folded up, in this manner, in the concavity in the front 

 of the head. 



The two pairs of gnathopoda unequal and unlike ; the first pair 

 shorter, and more robust than the second ; meros produced antero-infe- 

 riorly, at its extremity a number of stiff hairs, slightly curled at their 

 tips; carpus broad, jjroduced inferiorly, but not anteriorly, with its 

 anterior edge straight, and armed at the inferior angle with two stout 

 spines or bristles; propodus shorter than the carpus, and about one half 

 as broad ; dactylus very minute. The second pair has none of the joints 

 produced ; meros short, about one-fourth the length of the carpus ; the 

 latter slender and cylindrical ; propodus shorter than the carpus, and 

 about the same breadth, with its distal extremity slightly produced on 

 either side of the dactylus to an acute point, which is almost as long 

 as the short dactylus. This arrangement probably compensates for the 

 lack of the subchelate development of the carpus. 



The depth of the thorax decreases slightly posteriorly. The five 

 pairs of thoracic feet subequal ; the two anterior pairs directed forward, 

 with the last two joints flexed backward; the three posterior pairs 

 directed backward, with the tarsus and claw flexed forward ; a few short 

 hairs set equidistant along the posterior margin of the two anterior, and 

 on the anterior margin of the three posterior, pairs of legs. 



The peduncles of the anterior abdominal appendages broadly ellipti- 

 cal, decreasing in size posteriorly. Of the three posterior pairs of abdom- 

 inal appendages the ultiThate are the longest; the preceding pairs 

 nearly subequal ; the rami of the antepenult (external) the longest, of 

 the ultimate pair the shortest ; rami serrated. Telson short, lanceolate. 



Another specimen, a female with an incubatory pouch attached con- 

 taining young, was captured at the same time as the one just described; 

 and while the two differ widely in some respects, they have in common 



