COPEPODS OF THE WOODS HOLE REGION 131 



second exopod segment as long as the segment itself and denticulate 

 near its tip. Total length, 3.5 mm. 



Male. — First antennae as long as in the female and endopod of 

 iirst leg 2-segmented; right fifth leg with a stout spine on the inner 

 margin of the second basipod ; end segment of exopod turned inward 

 at right angles to the basal segment, and curved over the tip of 

 the endopod; second basipod of left leg with a stout spine on the 

 proximal inner corner, and a bunch of small spines at the distal 

 inner corner; left fifth endopod not reaching the distal end of the 

 second exopod segment. Total length, 3.54 mm. 



Remarks. — Wolfenden first described the two sexes as separate 

 species, but in 1911 recognized them as male and female of the 

 same species. The 2-segmented endopod of the first leg and the 

 spines of the inner margin of the second basipods of the fifth legs 

 m the male are the chief characteristics. The species has never 

 before been reported from our American shores, and would seem 

 to be a bottom form, being found by Wolfenden at depths of 1,500 

 to 3,000 meters. 



Two males of Lucicutia grandis were obtained by the Grarn'pus 

 just outside the present area southeast of Georges Bank, and the 

 species is likely to be obtained within the area at some future time. 



Family HETERORHABDIDAE 

 Genus HETERORHABDUS Giesbrecht, 1898 



Head separated from the first segment, with a distinct cervical 

 depression on the dorsal surface; urosome 4-segmented in female, 

 5-segmented in male ; genital segment nearly as long as the abdomen 

 and protruding ventrally; caudal rami asymmetrical, the left one 

 the larger, its second inner terminal seta greatly elongated; eye not 

 visible ; rami of all five pairs of legs 3-segmented ; exopods of second, 

 third, and fourth legs considerably enlarged, especially the end seg- 

 ment; fifth exopod in female with a slender falciform spine inside 

 the second segment; fifth exopods in male more or less prehensile, 

 without plumose setae. 



ICEY TO THE SPECIES (BOTH SEXES) 



1. First antennae not reaching caudal rami; frontal projection a 



rounded knob ; fifth exopod in female twice as long as endopod. 



norvegicus (p. 132) 

 First antennae reaching from 4 to 8 segments beyond tips of 

 caudal rami 2 



2. Frontal projection a sharp spine; end segment of third exopod 



unlike those of second and fourth legs, widened into an oval 



lamina spinifrons (p. 133) 



Frontal projection a flattened knob, nearly obsolete ; end segment 



of third exopod like those of second and fourth legs__ long'icornis (p. 134) 



