268 AJirniroKA nobmalia. 



transverse bands of dark reddish-brown, one to each segment on 

 the back ; the small coxae of the last three pairs of perciopoda are 

 also dark brown. 

 " Length 0-32 inch. 



*' Hah. Dredged in 35 fathoms, on a gravelly bottom, in Hake 

 Bay." — tStiuqison. 



Mr. Stimpson thinks that the degree of elongation and flexibility 

 of the flagi'lla of the antennaj is not a character of sufficient import- 

 ance to separate this species from Cerapus. 



Neither tlie figure that Stirapson gives of the caudal appendages, 

 nor his description of tlie posterior pair of pleopoda, is sufficiently 

 distinct to determine whether the latter appendage terminates in 

 two short, curved rami, or in one ramus ha\-ing two short, cui-ved 

 processes. I am inclined to think that this species is not a Cerapus. 



10. Cerapus Leachii. 

 Podocerus Leachii, Kroyer, Nat. Tidskr. iv. p. 163. 

 *' The eyes carried on prominent lobes. Superior antennae almost 

 as long as the inferior ; llagellum of the inferior antennae consist- 

 ing of twelve articuli. First pair of gnathopoda having the pro- 

 podos considerably dilated, rather longer than broad ; second pair 

 having the propodos very large : in the female the carpus is pro- 

 duced behind the propodos into a prominent tooth ; in the male, 

 on the contrary, the carpus becomes the hand and immoveable 

 finger, whilst the propodos and dactylos together form an efficient 

 thumb. First two paii's of pereiopoda subequal, having the basa 

 and mera squamiformly dilated ; third pair shorter than the others, 

 bases scutiform. Dorsal sui'face smooth, and destitute of teeth. 

 Coxae ciliated or plumose. 

 '' Hab. Taken in the GuK of Codanus, in a membranous tube." 



'* The female of this species, by the form of the second pair of gna- 

 thopoda, is Podocerus " [^Dercothoe*^ ; " the male being a true Erich- 

 thouius'' [_Cerapus']. — Kroyer. 



6. SIPHONffiCETUS. 



Siphonoecetus, Kroyer, Nat. Tidskr. i. p. 491 ; Voyage en Sca7id. pi. 20. 

 tig. 1. 



Spence Bate, Report Brit. Assoc. 1855 ; Synopsis, ^-c, Ann. Nat. 



Hist. Feb. 1857. 

 IVIiite, Hist. Brit. Crust, p. 196. 



Not laterally compressed. Superior antennae in advance of the in- 

 ferior ; inferior longer than the superior, subpediform. Gnatho- 



* Vide p. 259. 



