92 GAMMARIDJE. 



The eyes are small and oval ; they appear smaller 

 than they really are, for the black pigment is only 

 visible in the centre of the organ, the several lenses 

 forming an areola round the central spot. The superior 

 antennae are short. The first joint of the peduncle is 

 as long as the head, and has the upper margin produced 

 anteriorly so far that it reaches to the extremity of the 

 third joint. The second and third joints are short and 

 small, and gradually taper to the extremity of the 

 flagellum, which consists of but two or three articuli. 

 We have not observed the secondary appendage. The 

 inferior antennae are long, longer than the entire ani- 

 mal, and very slender. They bear a considerable re- 

 semblance to the same organ in Lysianassa longicornis. 

 The third and fourth joints of the peduncle are short, 

 being as broad as long ; the fifth or last joint is very 

 long, hollowed upon the under side near the base, 

 swelled near the middle, and gradually tapering to the 

 distal extremity ; the flagellum is very slender and long, 

 and is formed of articuli which are long and slender, 

 every articulus being furnished with a calceola a fact, 

 which, if Stimpson be correct, shows that our specimen 

 is a male animal. The first pair of legs are long and 

 slender, having the wrist longer than the hand, and the 

 under margin parallel with the upper ; the hand is not 

 broader than the wrist, and also has the under margin 

 parallel with the upper, the palm is short, oblique, and 

 concave. The second pair of legs are long, slender, and 

 membranaceous ; the wrist is longer than the hand ; the 

 hand has the infero-anterior angle produced to a blunt 

 point beyond the palm, equal to the length of the 

 finger, which is very short, and therefore approximates 

 nearly to a didactyle claw. The first two pairs of 

 walking legs are slender. The last three have the 



