646 REPOKT OF COMMISSIONER OF FISH AND FISHERIES. 



Peduncle of the anteimula about as long as the head ; the flagellum a 

 little longer than the peduncle, and composed of seven to nine segments. 

 Antennie somewhat longer than the antennuli© ; the two distal segments 

 of the peduncle elongated and nearly equal ; the flagellum usually but 

 little longer than the flagellum of the auteunala, and composed, usually, 

 of eight to ten segments. 



First pair of legs with the merus somewhat quadrate in outline; the 

 ischium and carpus articulated on the two anterior margins, and reach- 

 ing by, so as to touch each other; theposteroinferior angle being rounded 

 antl furnished with an area armed with numerous minute denticles, just 

 below which there are a few slender setae; the carpus much louger than 

 broad, as long as the "width of the first epimerou, somewhat triangular, 

 and furnished with a line of setteon each side near the distal excremity ; 

 the propodus slightly shorter than the carpus, a little less than half as 

 broad as long; the lateral margins strongly curved, and armed with 

 minute spinules ; palmary margin transverse, nearly straight, and armed 

 with a small tooth at the posterior angle; the dactylus very strongly 

 curved, and its tip closing behind the posterior angle. Second pair of 

 legs in the male greatly developed; the merus nearly quadrilateral, 

 considerably longer than broad; the postero-iuferior angle slightly 

 rounded and armed somewhat as in the first pair; the carpus not 

 longer than broad, with the posterior margin projecting into a process 

 nearly as long as the merus and extending along the posterior margin 

 of the propodus ; the propodus very stout, about as long as the depth 

 of the second epimerou ; the breadth greatest distally, and a little less 

 than the length; j)almary margin slightly oblique, armed with a sub- 

 marginal line of setse; the middle portion a little arcuate, with an abrupt 

 notch near the middle, and two slight emargiuations near the postero- 

 inferior angle; the dactylus stout, curved, and Avith the tip closing 

 behind the.angie of the propodus. In the female, the second pair of legs 

 are slender and weak, and the carpus and hand are elongated and nar- 

 row; the propodus not broader than the merus, more than twice as long 

 as broad; the j)Ostero-inferior angle produced distall}^, so that the 

 nearly straight prehensile portion of the palmary margin forms less 

 than a right angle with the posterior margin; the dactylus slightly 

 curved and fitting closely the palmary margin ; seventh pair of legs only 

 slightly longer than the sixth, and with the basis broad, and its poste- 

 rior margin serrate. 



The infero-posterior angles of the three first segments of the abdo- 

 men a little less than right-angled, but only slightly produced. First 

 pair of caudal stylets considerably longer than the second. Third pair 

 short ; the basal segments not reaching beyond the basal segments 

 of the second i)air, nearly as broad as long, and armed on the out- 

 side at the distal extremity with three or four stout spines ; the terminal 

 segment nearly as long as the basal, slender, tapering, and furnished 



