206 



AMPHIPODA. 



NATATORIA, 



GAMMARTlXfl. 



PHOXIDES. 



LILJEBORGIA SHETLANDICA. N. S. 



Specific character. First and second segments of the pleon unarmed ; 

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

 Secondary appendage of the superior antennae very short. Inferior antennae 

 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 antenna. 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 antennae, and the secondary appendage extremely 

 short. The inferior antennae have the last two 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 



