206 



GAMMA RTD^. 



AMPHIPODA. 



NATATOniA. 



PHOXIDES. 



LILJEBORGIA SHETLANDICA. N. S, 



Specific character. First and second segments of the pleon unai-med ; 

 fourth and fifth segments dorsally produced jDOsteriorly into a small tooth. 

 Secondary appendage of the superior antenna3 very short. Inferior antennse 

 having the flagellum longer than the last joint of the peduncle. Dactyla of 

 the gnathopoda unarmed. 



Length \ inch. 



The head is not produced anteriorly. The dorsal 

 surface of the animal is smooth, except a small tooth- 

 like process, developed from the centre of the posterior 

 margins of the ante- and penultimate segments of the 

 tail. The eyes are small, round, and situated in their 

 normal position on a lobe between the superior and in- 

 ferior antennse. The superior antennae have the second 

 joint of the peduncle longer than the first, the third 

 joint very small, the flagellum reaching beyond the ex- 

 tremity of the penultimate joint of the peduncle of the 

 inferior antennse, and the secondary appendage extremely 

 short. The inferior antennas have the last tw^o joints of 

 the peduncle very long and subequal, and the flagellum 

 is rather longer than the last joint of the peduncle. The 

 first pair of legs have the hands not dilated, but rather 

 tapering to the distal extremity, and the wrist is nearly 

 as long as the hand. The second pair of legs have the 



