COPEPODS OF THE WOODS HOLE EEGION" 



285 



luster, deepest on the head and gradually fading posteriorly. The 

 digestive canal is reddish yellow and surrounded with small red oil 

 globules; the sides of the body are also more or less tinged with red 

 and this color spreads onto the ventral surface of the genital segment 

 and onto the ventral and dorsal surfaces of the penultimate abdomi- 

 nal segment. The basal segments of the first antennae are tinged 

 with blue, the rest of these appendages, the mouth parts, the swim- 

 ming legs, the anal segment, and the caudal rami are yellow. The 

 eggs are blue at first and turn red as they mature. The male is 

 much paler in color than the female. (Rathbun.) 



Figure 176. — Miracia efterata: a. Female, lateral; b, male, dorsal; c, 

 female, fifth leg; d, male, fifth leg. (From W. M. Wheeler) 



Female. — Urosome nearly as long as metasome, its segments not 

 denticulate; caudal rami three times as long as wide, a little shorter 

 than the last two abdominal segments combined. First antennae 

 much shorter than the cephalic segment and slender. The second 

 basipod of the first legs has on its inner margin near the distal end 

 a small oval spot set with short bristles like a comb. Fifth legs 

 foliaceous, the distal segment four times as long as wide, with three 

 apical and three outer setae, all about the same length, nonplumose, 

 but covered with minute knobs. Basal expansion reaching beyond 

 71937—32 20 



