COPEPODS OF THE WOODS HOLE REGION 43 



Feniale. — Body elliptical in outline, widest at the center, narrow- 

 ing equally in front and behind; genital segment longer than the 

 first two abdominal segments combined ; caudal rami as wide as long, 

 each with four setae of about equal length. Total length, 1.15- 

 1.6 mm. 



Male. — Body oval in outline, widest posteriorly, narrowed much 

 more in front than behind; first abdominal segment twice as long 

 as the genital segment, and longer than the other two abdominal seg- 

 ments together; setae of caudal rami more unequal in length than 

 in the female, the second inner one the longest. Total length, 

 1.1-1.2 mm. 



Remarks. — Wheeler's specimens are the only ones thus far re- 

 corded from our American shores. The species is evidently a rare 

 visitor here, but it will undoubtedly be found again within the 

 limits of the present area. 



Genus PSEUDOCALANUS Boeck. 1872 



Body slender, head fused with the first segment ; fifth segment with 

 rounded posterior corners; urosome slender, 4-segmented in female, 

 5-segmented in male ; first antennae reaching about the center of the 

 abdomen ; exopods of first 4 pairs of legs 3-segmented ; first endopods 

 1-segmented, second endopods 2-segmented, third and fourth endo- 

 pods 3-segmented ; none of the legs widened or with spinules on the 

 surface; fifth legs lacking in female, present in male. One species 

 found here. 



PSEUDOCALANUS MINUTUS (Kr0yer) 



Figure 25 



Calanus minutus Kk0yer, Naturh. Tidsskrift, ser. 2, vol. 2, p. 543, 1849. 

 Pseudocalanus minutus With, Danish /Mfiroif-Expedition, vol. 3, pt. 4, Copepoda 

 1, p. 57, pi. 1, fig. 8, 1915. 



Occurrence. — Forty-five males and females from surface tow on 

 Georges Bank, September 14, 1872; 1,000 males and females from 

 Gulf of Maine, March and April, 1920, Stations 20062, 20069, 20077, 

 20108, Grampus. 



Distribution. — Norwegian coast (Boeck, Sars) ; Shetland Islands 

 (Norman) ; English Seas (T. Scott, Brady) ; Bohuslan (Trybom) ; 

 Canary Islands, Malta (Thompson) ; North Sea (Mobius, Timm, 

 Bourne) ; Helsingfors (Nordquist) ; Wimereux (Canu) ; Baltic Sea 

 (Hensen) ; Greenland, Iceland, Faroe Islands (With) ; Alaska, 

 Arctic Ocean (Willey, Mrazek) ; North Atlantic (Farran, Cleve) ; 

 Kiehle Fohrde (Oberg, Giesbrecht) ; Adriatic (Pesta) ; Iceland 

 (Paulsen) ; Mediterranean, Gulf of Suez (Thompson and Scott) ; 

 Gulf of Maine (Bigelow) ; Chesapeake Bay (Wilson). 



