SIPHONCECETES CRASSICOENLS. 



469 



AMPIIJPODA. 



NJTATOniA. 



PODOCERIDES. 



SIPHONCECETES CRASSICORNIS ? . 



Specific character. Head produced into a rostnim. Superior antennte 

 liaving the first joint large, and supero-anteriorly produced to a poixected 

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

 first and second pairs of pereiopoda short and slightly curved. 



Length g inch. 



Siphonosccles crassicornls. Spence Bate, Rep. Brit. Assoc. 1855, p. 59. 

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

 Amph. Brit. Mus. p. 2G9, 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 antennaj 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 



