S1PH0NCECETES CRASSICORNIS. 
469 
AMPHIPOBA. PODOCERIBES. 
NAT ATOM A. 
SIPHONCECETES CRASSICORNIS $. 
Specific character. Head produced into a rostrum. Superior antennae 
having the first joint large, and supero-anteriorly produced to a porrected 
point. Inferior antennae but little longer than the superior. Dactyla of the 
first and second pairs of pereiopoda short and slightly curved. 
Length 5 inch. 
Siphonoecetes 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 
