COPEPODS OF THE WOODS HOLE REGION 



TORTANUS DISCAUDATUS (Thompson and Scott) 

 FlGlTvE 114 



167 



Corymira discaudata Thompson and Scott, Proc. Liverpool Biol. Soc, vol. 12, 



p. 80, pi. 6, figs. 1, 10, 11, pi. 7, figs. 1, 2, 1897. 

 Tortanus discandatus Giesbrecht and ScHMEaL, Das Tierroich, Lief. G, Cope- 



poda, p. 158, 1898. 



Occurrence. — Both sexes in vertical net, Station 20103, Gr'ampus^ 

 southeast of Nova Scotia; both sexe,s in surface tow at Menemsha 

 Bight, Marthas Vineyard, August, 1926, by the present author. 



Figure 114. — Tortanus discaudatus: a. Female, dorsal; &, male, dorsal; 

 c, male, right first antenna ; d, male, second antenna ; e, male, first 

 leg; f, male, fifth legs; g, female, fifth legs. (From W. M. Wheeler) 



Distmhution. — Gulf of St. Lawrence, Puget Sound (Thompson 

 and Scott) ; North Sea (van Breemen) ; off Nova Scotia (Wright) ; 

 off Prince Edward Island and New Brunswick (Willey) ; Gulf of 

 Maine (Bigelow) ; Woods Hole (Wheeler, Fish). 



Color. — Body rather opaque and colorless except along the mid- 

 line of the ventral surface, where in the female there are spots of 

 reddish brown, in the male of black pigment. There is also in the 

 male a ,spot of the same black above the intestine in the fifth seg- 

 ment. The hand of the chela in the fifth legs has a faint wash of 

 reddish brown; the last two abdominal segments are covered with 

 minute spots of bright reddish brown, which extend onto the caudal 

 rami and become continuous there, covering the whole dorsal 

 surface. 



