COPEPODS OF THE WOODS HOLE REGION" 103 



ment with a fringe of coarse teeth; left endopod a flattened blade, 

 1-segmented, as long as the 2-segmented exopod, which is tipped with 

 four spines. Total length, 1-1.25 mm. 



Remarks. — This is a salt- or brackish-water species, easily recog- 

 nized by the caudal rami and the fifth legs, and the asymmetry in 

 the female. Its presence in Barnstable Great Pond is a notable ex- 

 ception to the regular distribution, but that pond also contains other 

 exceptions. 



Family TEMORIDAE 



Genus TEMORA Baird, 1850 



Body short and compact; fourth and fifth segments fused; genital 

 segment flattened ventrally ; caudal rami much elongated, sometimes 

 asymmetrical ; urosome 3- or 4-segmented in the female, 5-segmented 

 in male ; endopods of first four pairs of legs 2-segmented ; first ex- 

 opods 3-segmented, second, third, and fourth exopods 2-segmented, 

 terminal spines coarsely toothed; fifth legs of female uniramose, 

 3-segmented, symmetrical ; left leg of male biramose, exopod 2-seg- 

 mented, endopod 1-segmented, nearly as long as the exopod and form- 

 ing with it a chela ; right leg of male uniramose and 3-segmented. 



KEY TO THE SPECIES 



Posterior corners of fifth segment with stout acuminate spines ; 



caudal rami symmetrical, six times as long as wide stylifera (p. 104) 



Posterior corners of fifth segment smoothly rounded, without 



spines 



2 



2. Anal segment longer than penultimate segment; caudal rami 

 symmetrical, nine times as long as wide; no caudal seta 



widened longicornis (p. 105) 



Anal segment shorter than penultimate segment; caudal rami 

 seven times as long as wide, right one longer than left, 1 seta 

 widened turbinata (p. 106) 



1. End segment of left fifth exopod greatly swollen, subspherical ; 



terminal claw of right fifth leg as long as leg itself stylifera (p. 104) 



End segment of left fifth exopod not swollen ; terminal claw of 



right fifth leg shorter even than second segment of leg itself 2 



2. Distal segment of left fifth exopod a little wider than basal seg- 



ment, with 2 stout equal apical spines turbinata (p. 106) 



Distal segment of left fifth exopod narrower than basal segment, 

 with 1 short apical spine and a much longer slender 

 seta longicornis (p. 105) 



