Heterocuma sarsi, Miers. 613 



The antennules (fig. 3) are short and stout, tlie first seg- 

 ment of the peduncle about equal to the second and third 

 together, and the second a little shorter and a good deal 

 stouter than the third. Both flagella are present, each com- 

 posed of two segments ; the minor flagellum is shorter than 

 the first segment of the major. The antenna? (fig. 4) have 

 four plumose seta? on the basal segment, and the distal seg- 

 ment is very small. 



The mandibles are of normal form, with about 17 spines. 

 The maxillula? (fig. 5) have a very long and slender palp, 

 more than twice as long as the distance from its base to the 

 tip of the distal lobe, with two apical seta?. The maxilla? are 

 of normal form. 



The branchial apparatus (fig. 6) has a large number of 

 lobules (about 40) disposed in a straight row. I was unable 

 to demonstrate the existence of an anterior reflexed lobule, 

 but am not confident of its absence. 



The third maxillipeds (rig. 7) have the basis slightly ex- 

 panded distally, where its width is nearly one-fourth of its 

 length along the inner edge. The distal inner corner forms 

 a short acute tooth ; the outer corner is produced as a large 

 bluntly pointed lobe extending as far as the distal end of the 

 merus and fringed with long seta? near the tip. The ischium 

 is narrow, but the merus is produced on the outer side as an 

 acutely pointed lobe tipped with a single long seta. The 

 carpus is expanded on the inner side so as to assume a 

 triangular form. 



The first legs (fig. 8) have the basis rather slender and a 

 little shorter than the distal segments together ; it has a pair 

 of stout spines on the inner edge near the base, and the distal 

 inner corner forms a small acute tooth. The carpus and 

 propodus are subequal, and the dactylus is two-thirds as long 

 as either; the propodus carries at the distal end of its inner 

 edge a group of very long seta?. 



The second legs (fig. 9) are short and stout ; the basis is 

 two-thirds as long as the distal segments together and carries 

 a setose styliform exopod extending beyond its distal end; 

 the ischium is suppressed; the merus has a stout spine at its 

 distal inner angle ; the carpus is as broad as long and not 

 much longer than the propodus; the dactylus is strongly 

 spinose. The third legs (fig. 10) have a styliform exopod 

 like that of the second legs, but it does not extend beyond 

 the middle of the basis. 



The peduncle of the uropods (fig. 12) is a little longer 

 than the last somite and has a row of unequal spines on the 

 inner edge. The rami are somewhat flattened. The endopod, 



