COPEPODS OF THE WOODS HOLE REGION 189 



seta on the outer margin. The exopod of this antenna is linear and 

 1-segmented, and is attached to the side of the proximal endopod 

 segment some distance in front of where it is divided; it is tipped 

 with two small subequal setae. The mandible has a stout mastica- 

 tory blade armed with five small inner teeth and an elongated, 3- 

 lobed tooth at the outer corner ; the palp is biramose. the two rami 

 some distance apart and of about equal length. The palp of the 

 first maxilla is also biramose, the rami fused at their bases ; the sec- 

 ond maxilla has three digitiform processes inside the terminal claw. 

 The maxillipeds are powerfully developed and are made up of two 

 segments and a terminal claw ; the basal segment has a tuft of hairs 

 on each lateral margin and a seta near the distal end on the ventral 

 surface; the second segment is the same length as the first, is slightly 

 swollen through the center, and carries a small seta on the inner 

 margin near the distal end; the terminal claw is slender and about 

 as long as the second segment, without an accompanying bristle. 



Both rami of the first legs are 2-segmented ; the basal segment of 

 the exopod has a spine and a fringe of short hairs on the outer mar- 

 gin, the distal segment is three times as long as the basal and 

 enlarged at the tip, where it ends in three short claws of equal 

 length, curved outward, and a smaller fourth one curved in the 

 opposite direction. The basal segment of the endopod is four times 

 as long as the distal segment; the latter is subspherical and tipped 

 with two equal curved claws. The rami of the three following pairs 

 of legs are 3-segmented, the two basal segments of the second and 

 third exopods often fused, but distinctly indicated by the armature. 

 The basal segment of the second endopod is without a seta, the mid- 

 dle segment has one and the terminal segment two on the inner 

 margin. The basal segment of the third and fourth endopods has 

 one inner seta, the middle segment has none, the end segment of the 

 third leg has two inner setae, of the fourth leg only one seta. The 

 spines of the exopods are perfectly smooth and show no trace of 

 dentation, ciliation, or pectination; and the same is true of the ter- 

 minal claws of the first legs. There is thus a complete absence of 

 the brushlike or comblike series of cilia so characteristic of the 

 genus ZaviS. 



In the fifth legs the inner expansion of the basal segment is com- 

 paratively narrow and does not reach the center of the distal seg- 

 ment ; it has one terminal seta and two on the inner margin, the three 

 some distance apart and the intervening margin fringed with 

 spinules. The distal segment is twice as long as wide, considerably 

 tapered distally, with a terminal seta and spine, two spines on the 

 outer and one on the inner margin. Both segments are covered on 

 71937—32 14 



