FEOM THE GULF OF GUINEA. 103 



The joints bear from, one to four setae each, except the last, which has one on the 

 upper and four on the lower side ; it has also three terminal sette. The seta wliich 

 springs from the upper distal angle of the third joint is longer than those on the other 

 joints except the last, and a long sensory filament springs from the upper distal angle 

 of the fourth joint. In the male antennae the first three joints are short, the third being 

 shorter than either of the other two ; the fourtli is dilated and longer than the 

 preceding three together ; the fittli is short ; the sixth long and slender ; the seventh 

 is very small ; the eishtli a little longer than the seventh and furnished with four 

 terminal seta} ; the male antenna} hinged between the fifth and sixth joints. The 

 following are the proportional lengths of the joints : — 



10 . 9 . 4 . 24 . 9 . 11 . 2 . 5 



1234 5 678 



Posterior antenna} 4-jointed — the last joint as long as the preceding two together, 

 and ciliated along one of its margins. A small 1-jointed secondary appendage, furnished 

 with two stout terminal setaj and a few marginal cilia, springs from the end of the 

 second joint. Mouth-organs as in Mlracia efferata, except that the posterior foot-jaws are 

 3-jointcd and nearly alike in both sexes, but that of the male has a longer terminal claw ; 

 in neither, however, is the terminal claw so short as in Miracia efferata. The first pair 

 of swimming-feet has the inner branches scarcely so long as the outer ones ; the second 

 joint of the outer branches is furnished with a moderately long plumose hair on the inner 

 distal angle ; the inner margin is fringed with short stoixt settc, as are also the ends of 

 the first and second joints. The second pair in the female resembles the third and 

 fourth pairs, but are rather smaller. The inner branches of the second jiair in the male 

 are 2-jointed ; the last joint bears one short terminal spine, and one on the lower half of 

 the outer margin ; on the inner margin are two long plumose hairs. The third and fourth 

 pairs are similar in both sexes ; the inner branches being shorter than the outer ; all the 

 joints of botli branches are fringed with hairs on the external margin ; the inner distal 

 angle of the last joint bears a long, slender, non-plumose hair (or spine). The fifth feet 

 small, foliaceous, 2-jointed ; the proximal joint in the male is armed with two spinous setae ; 

 the distal bears one long setiferous spine and two short spines, also a small hair on the 

 inner aspect, as shown in the figure. In the female the proximal joint is armed with 

 one long setiferous spine and four small spinous setjie (one of which is very minute) ; 

 the distal joint is somewhat cylindrical in form, and is furnished with several setiferous 

 spines at the extremity. Abdomen in the male 5-, in the female i-jointed — the first 

 two joints being coaleseent in the female. The posterior margin of the last three 

 segments, in both sexes, fringed with small spinous seta}. Caudal stylets rather longer 

 than the last abdominal segment, each furnished with one moderately long setiferous 

 and two shorter spines, besides several spinous setae on the outer aspect near the middle 

 of the stylet. At the extremity are one long and stout and one short setiferous spine 

 and a number of spinous setee ; the long terminal setiferous spine is fully half as Ion"- 

 again as the stylet. 



