LYSIANASSA LONGICORNIS. 
85 
AMPHIPODA. LYSIANASS1DES. 
NATATORIA. 
LYSIANASSA LONGICORNIS. 
Specific character. Inferior antennae longer than the animal in the male’ 
but a little shorter in the female. 
Length | in. 
Lysianassa longicornis. Lucas, Expl. Sci. Algerie Zool. i. Crust, p. 53, pi. 
5, fig. 2. Spence Bate, Cat. Amph. Brit. Mus. 
p. 70, pi. xi. fig. 2. Ann. Nat. Hist. 2nd Ser. 
xx. p. 525 (Jan. 1858.) 
Lysianassa Cliausica. Spence Bate, Ann. Nat. Hist. (1857) v. xix. p. 138. 
White, Pop. Hist. Brit. Crust, p. 168, (not 
Alibrotus Chausicus M. -Edwards’ Hist. Crust, 
iii. 23.) 
The head has the lobes between the antennae pro- 
duced to a somewhat down-curved point, extending fur- 
ther forwards than the upper extremity of the head, and 
extending beyond the basal half of the first joint of the 
peduncle of the upper antennae. The back is long and 
smooth ; but the three last joints of the tail are suddenly 
