COPEPODS OF THE WOODS HOLE REGION 



373 



Distribution. — Messina (Claus, Haeckel) ; Canary Isles, Malta 

 (Thompson) ; Mediterranean, tropical Atlantic (Giesbrecht) ; Adri- 

 atic (Steuer, Pesta) ; North Atlantic (Cleve) ; Red Sea, Indian Ocean 

 (Thompson and Scott) ; Malay Archipelago (A. Scott). 



Color. — Body transparent and almost colorless, but spotted on the 

 dorsal surface with dark-brown pigment. The spots are arranged in 

 rows of five across the center of each abdominal segment, two on 

 each side, and one on the midline. In the genital segment the one on 

 the midline disappears ; in the head and first four thoracic segments 

 the color spots are more numerous, but are irregularly arranged and 

 of different sizes. In the female the spots on the urosome are lacking, 

 but those on the metasome are still distinct after 45 years in alcohol. 



Female. — Head one-half wider than long, widest at the posterior 

 margin ; first and second thoracic segments as wide as the head ; third 

 and fourth segments tapered regularly backward; fifth segment 



FiGORB 228. — SappMrina nigromaculata: a. Female, dorsal (drawn by Rath- 

 bun) ; b, male, dorsal ; c, female, second antenna ; d, female, fourth leg 



abruptly narrowed to half the width of the fourth; caudal rami 

 twice as long as wide. Fourth segment of second antenna three 

 times as long as the third segment, the two together the same length 

 as the second segment. The endopod of the fourth leg not half so 

 long as the exopod, its two apical spines equal and very slender. 

 Total length, 1.9-2 mm. 



Male. — Head twice as wide as long; corneal lenses visible on the 

 frontal margin in dorsal view. The two terminal segments of the 

 second antenna are together about one-fourth longer than the second 

 segment ; the terminal segment of the second endopod has two lanceo- 

 late flanged spines, one awl-shaped dentate spine, and two small 

 spines around the apex. Total length, 2.05-2.45 mm. 



