SIPHONCECETES TYPICUS. 465 



AMPHIPODA. PODOCERIDES. 



NATATORIA. 



SIPHONCECETES TYPICUS. 



Specific character. Antenna cylindrical : superior reaching to tlie ex- 

 tremity of the peduncle of the inferior : inferior antennae nearly as long as 

 the animal ; flagellum with three joint-like articuli, the first and second 

 gi'eatly elongated. 



Length \ inch. 



Sipho7icece(es typicus. Kroyer, Nat. Tidsk., 2. Ser., i. p. 491, pi. vii. fig. 4. 

 Voyage en Scand. Cmst., pi. xx. fig. 1. Spence 

 Bate, Cat. Amph. Brit. Mus. p. 270, pi. xlvi. 

 fig. 1 (after Kroyer). 



The eyes are round. The superior antennae are about 

 one-half the length of the animal. The inferior have 

 the peduncle nearly as long as the superior antennae ; 

 the flagellum consists of two very long and one short 

 articuli. In Kroyer's figure of this organ the second 

 articulus is shorter than the first, and, as w^ell as the 

 third or last, is furnished with a few strong, sharp, and 

 slightly-curved spines, besides the fine hairs. The first 

 pair of legs are slender, the wrist being as long as the 

 hand, of which the palm is extremely oblique. The second 

 pair are a little stouter than the first, and the hand some- 

 what less oblique, and more clearly defined. The first 

 two pairs of walking legs have the thighs but moderately 

 dilated, and the finger nearly straight. The last three 

 are very short ; and the penultimate pair of caudal 

 appendages are as long as the ultimate. 



H H 



