S1PH0NCECETES CRASSICORNIS. 



469 



AM PITI POD A. 



NATATOIiJA. 



PODOCERIDES. 



A 







SIPHONCECETES CRASSICORNIS $ . 



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

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

 [ lint. Inferior antenna? but little longer than the superior. Dactyla of the 

 first and second pairs of pereiopoda short and slightly curved. 



Length i inch. 



SipJioncecetes 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 antennas 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 antennas are scarcely longer 

 than the superior, and are considerably shorter than in 



