COPEPODS OF THE WOODS HOLE BEGION 87 



Female. — First antennae extending three or four segments beyond 

 the tips of the caudal rami ; fifth segment with rounded corners ; uro- 

 some symmetrical, without spines or knobs ; each caudal ramus with 

 a peglike process on the ventral surface at the distal margin be- 

 tween the two outer setae ; endopod of fifth leg not reaching beyond 

 the spine on the second segment of the exopod. Total length, 

 2-2.35 mm. 



Male. — First antennae as long as in the female ; fifth segment with 

 rounded corners; caudal rami twice as long as wide, with a peglike 

 process as in the female; thumb of the chela on the right fifth leg 

 shorter than the finger, widened and flattened into a lamina, which 

 is bluntly rounded at the tip ; this chela is intermediate in size be- 

 tween those of the other two species here described. Total length, 

 2-2.25 mm. 



Remarhs. — This species is distinguished by the rounding of the 

 posterior corners of the fifth segment, by the symmetry of the uro- 

 some, and by the pegs on the ventral surface of the caudal rami. It 

 seems to be fairly well distributed throughout the area. 



CENTROPAGES TYPICUS Kr0yer 



Figure 60 



Centropages typicus Kr0yeb, Naturh. Tidsskrift, ser. 2, vol. 2, p. 588, pi. 6, 1849. — 

 Sabs, Crustacea of Norway, vol. 4, p. 75, pis. 49^51, 1902. 



Occurrence. — Eight males and females in surface tow on Georges 

 Bank, September, 1872; 100 males and females, surface tow, Me- 

 nemsha Bight, Marthas Vineyard, September, 1882; 2 females, sur- 

 face tow, Station 1222, Fish Haiok; 20 males and females, surface 

 tow. Woods Hole Harbor, July, 1925. 



Distribution. — Cape Finisterre (Kr0yer) ; coast of France 

 (Canu) ; British Isles (Brady) ; Helgoland (Claus) ; tropical and 

 northern Atlantic (Cleve) ; coast of Norway (Sars) ; Skager Rak 

 (Cleve) ; Gulf of Maine (Bigelow) ; Woods Hole (Fish, Wheeler) ; 

 Chesapeake Bay (Wilson). 



Color. — Body highly transparent, with reddish-brown pigment 

 scattered irregularly throughout its entire length. In the male this 

 pigment is more extensive than in the female, and extends into the 

 bases of the mouth parts and the swimming legs. It often colors 

 the whole of the mouth parts and the enlarged part of the right 

 antenna. In the female the red or orange predominates in the an- 

 terior thorax and head, and extends posteriorly along the broad lon- 

 gitudinal muscles. This color also appears across the posterior mar- 

 gins of the last three thoracic segments, and on the dorsal surface of 



