LYSIANASSA ATLANTICA. 83 



that, at the first glance, gives it the appearance of being 

 the anterior extremity of the head ; the second and third 

 joints overlap each other, and are reduced in length to 

 the limits of very short joints, and not half as broad as 

 the first. The flagellum is not so long as the peduncle : 

 it consists of seven articuli, of which the first is longer 

 than the two last joints of the peduncle together; the 

 rest, together, are as long again as the first. The in- 

 ferior antennae are as long again as the superior, and 

 much more slender. The peduncle does not reach be- 

 yond the peduncle of the superior ; the flagellum con- 

 sists of about twenty-one or twenty-two articuli, of 

 which the first is as long as the two following; each 

 articulus carries one or two minute hairs ; but the in- 

 ferior, as well as the superior pair of antennae are very 

 free from any appearance of cilia. The organs of the 

 mouth are hid by the lateral appendages. The first pair 

 of legs have the coxa deeper than the segment to which 

 it is attached, the other joints are long and slender, the 

 wrist is continuous with, and as long as, the hand : it 

 increases in diameter until it meets the posterior ex- 

 tremity of the hand, which is its broadest part ; the 

 hand is there also at its broadest diameter, from which 

 it gradually tapers to the distal extremity, where it sup- 

 ports a short, slightly-curved finger. The second pair 

 of legs are a little longer than the first ; the coxa is 

 deeper than the second segment ; the wrist is longer than 

 the hand ; the hand is but little broader than the wrist, 

 upper margin arcuate, inferior straight, palm very short, 

 truncate, fringed with short cilia, and defined from the 

 inferior margin by a right angle. The distal half of the 

 upper margin is fringed with several rows of long hairs. 

 The perambulatory legs are subequal in length ; the two 

 anterior pairs (or the third and fourth pairs of legs) 



G 2 



