22 



BUULETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



Male. — Considerably smaller than the female, with the fifth seg- 

 ment a little less sharply pointed at the posterior corners; left fifth 

 exopod longer than the right, its terminal segment narrowed and 

 turned inward ; left endopod reaching well beyond the center of the 

 end segment of the exopod; in the right leg the endopod does not 

 reach the center of the last segment of the exopod. Total length, 

 6-7 mm. 



Remarks. — This is one of the largest calanoids and may be recog- 

 nized by its size and the length of the first antennae. Its distribution 

 indicates that it is an arctic species, but it is common in the Gulf 



of Maine and in the winter extends 

 southward at least to the Gulf Stream. 

 In economic importance its large size 

 somewhat compensates for its rather 

 meager numbers. Sars regarded it as 

 a " relict " species. 



CALANUS MINOR (Glaus) 



Figure 9 



CetocMlus minor Claus, Die frei lebenden 

 Copepoden, p. 172, 1863. 



Calanus minor Giesbrecht and Schmeil, Das 

 Tierreich, Lief. 6, Copepoda, p. 15, 1898. 



Occurrence. — Eight males and fe- 

 males from trawl wings. Stations 981, 

 985, 992, Fish Hawk; 100 males and 

 females from trawl wings. Stations 

 2195, 2204, 2236, Albatross; 2 females 

 surface tow, Georges Bank; 20 males 

 and females, surface tow 75 miles south 

 of Gay Head; 6 females surface tow. 

 Station 20106, Grampits. All except 

 the last were taken by Eathbun. 

 Distribution.— MessinsL (Claus) ; Australia (Brady) ; Canary Isles 

 and Malta (Thompson) ; tropical Atlantic (Giesbrecht) ; tropical 

 Pacific, Indian Ocean (Giesbrecht) ; California coast (Esterly) ; 

 Adriatic (Steuer) ; Mediterranean, Red Sea, Indian Ocean (Thomp- 

 son and Scott) ; Woods Hole, Mass. (Wheeler) ; Arabian Sea, Malay 

 Archipelago (Cleve). 



Color. — Entire body varying from pink to bright orange-red, the 

 color not constant but very irregularly distributed. It is generally 

 most intense through the center of the body and in the head. The 

 outside surface is covered with fine spots of a deeper red, these 



FiGDEK 9. — Calanus minor: a, Fe 

 male, dorsal ; h, fifth leg 



