AMPHIPODA. 



NJTATORTA. 



S1PHONCECETES CRASSICORNIS. 469 



PODOCERIDES. 



SIPHONCECETES CRASSICORNIS $ . 



Specific character. Head produced into a rostrum. Superior antenna; 

 having the first joint large, and supero-anteriorly produced to a porrected 

 point. Inferior antenna but little longer than the superior. Dactyla of the 

 first and second pairs of pereiopoda short and slightly curved. 



Length 3 inch. 



SipJioimcetes crassicornis. SPENCE BATE, Rep. Brit. Assoc. 1855, p. 59. 

 Ann. Nat. Hist. 2 ser. xix. p. 149. Cat. 

 Amph. Brit. Mus. p. 269, pi. xlv. fig. 9. 

 WHITE, Pop. Hist. Brit. Crust, p. 197. 



THE only specimen which we have seen of this species 

 is a female. It is long and flat, the head being an- 

 teriorly produced into a rostrum. The eyes are small 

 and round. The superior antennae are not one-fourth 

 the length of the animal ; the first joint of the 

 peduncle is very large, and anteriorly produced, upon 

 the upper side, to a long horn-like point, whence the 

 specific name. The inferior antennae are scarcely longer 

 than the superior, and are considerably shorter than in 



