COPEPODS OP THE W001>S HOLE REGION 241 



ovaries and oviducts deep red. In the male the head is whitish and 

 the rest of the body a uniform pinkish red. 



Female. — Body five times as long as wide; cephalic segment much 

 shorter than the rest of the thorax; rostrum slender and pointed; 

 urosome two-thirds as long as metasome; caudal rami much wider 

 than long. Aesthetask on fourth segment of first antenna reaching 

 half its length beyond the tip of the antenna ; rami of first legs equal, 

 basal endopod segment with a row of spinules on its outer margin 

 distally; basal expansion of fifth legs reaching beyond center of 

 distal segment, with five setae, the second outer one elongate; distal 

 segment oval, with five setae, the middle one filiform. Total length, 

 0.7-0.8 mm. 



Male. — First antennae 9-segmented and geniculate, the fourth, fifth, 

 and sixth segments much enlarged and forming the hand of a chela, 

 with the dactylus composed of the last three segments; aesthetask 

 as long as in the female; none of the endopods of the swimming legs 

 modified; fifth legs smaller than in the female, the distal segment 

 broadly oval, with six setae, the first and fourth outer ones elongated, 

 the second and third filiform, the second one almost obsolete; basal 

 expansion scarcely reaching beyond the base of the distal segment, 

 with three subequal setae. Total length, 0.6-0.7 mm. 



Remarks. — This species may be distinguished by the structure of 

 the first and fifth legs. It is a littoral form found in brackish 

 water, but it lives also in fresh water, as shown by its occurrence in 

 the French Watering Place. This is the first record of its presence 

 in American waters. 



NITOCKA TYPICA Boeck 



Figure 161 



Nitocra typica Boeck, Forh. Vid.-Selsk. Ghristiania, 1864, p. 274. — Sabs, 

 Crustacea of Norway, vol. 5, p. 212, pi. 138, 1907. 



Occurrence.— Two females were washed from the sand on the surf 

 beach of the southern shore of Marthas Vineyard, August, 1927. 



Distribution. — British Isles (Brady) ; Kiel Bay (Giesbrecht) ; 

 Dutch coast (van Breemen) ; French coast (Canu) ; Nova Zembla 

 (T. Scott) ; Norwegian coast (Sars). 



Color. — Body semitransparent and whitish, one of the females 

 faintly tinged with blue; eye reddish, scarcely visible. 



Female. — Body sublinear, metasome scarcely wider than the uro- 

 some; cephalic segment little more than one-third the length of the 

 metasome; urosome three-fifths as long as metasome; genital seg- 

 ment with only faint indications of division; anal segment shorter 

 than preceding segment and coarsely spinulose; anal operculum 

 fringed with stout spines ; caudal rami wider than long, apical setae 

 jointed near their base. First antennae 8-segmented, densely setose ; 



