252 AMPIIIPODA NORMALIA. 



tcnuic a little longer than the inferior. Unathojjoda subequal, 

 robust ; dactyla sen'ated. Kami of the posterior pair of pleo- 

 poda subequal, short, conical. Telson armed with two cuiTed 

 spines. 



" Uab. Common from Fin mark to Fretum Soimd." — Bnizelius. 



I have followed Bruzelius in accepting Ampli'dlioii aJhomaculata as 

 synonymous with A. podoceroides. Kroyer, in the plates of his 

 ' Voyage on Scandina\'ie,' represents the toLson of ^. alhomaculata as 

 simple, squamous, rounded at the apex. Should Bru7A'lius be in eiTor 

 in stating it as terminating in two hooks, then it differs in nothing 

 from the genus Amphitlwe. 



3. PODOCERUS. 



Podocenis, Leach, Linn. Trans, xi. p. 300. 



Dcsmaresi, Consul, sur Ics Crust, p. 269. 



Edicards, Hist, des Crust, iii. p. 63. 



Spence Bate, Syno2)sis, ^t., Ann. Nat. Hist. Feb. 1857. 



Gosse, Mar. Zool. p. 141. 



indte, Hist. Brit. Crust, p. 197, 



Bruzelius, Skand. Anijj/i. Ganim. p. 20. 

 Jassa, Leach, Linn. Trans, xi. p. 361. 



Desmarest, Consid. sur les Crust, p. 269. 



White, Hist. Brit. Crust, p. 198. 

 Isch^Tocerus, Krot/er, Gronl. Amjip. p. 283. 

 Cratopliium, Liana, U. S. Explur. Exped. p. 841. 

 Elasmopus, Costa, Rend, delta Reah Accad. delle Scienze di Nupoli, 

 1853, p. 170. 



Eyes small, situated on a lobe between the superior and inferior an- 

 tennae. Superior antennae having a secondary api^endage, which is 

 generally very minute. Inferior antennae robust, the flagellum con- 

 sisting of but few articuli and as stout as the peduncle, the haii-s 

 towards the extremity being developed into spines, which increase 

 in strength as they approach the apex, where they become cui'ved. 

 Second paii' of gnathopoda having the propodos (in the male) much 

 larger than that of the first pair-. Two anterior pairs of pereio- 

 poda short, having the basa very broad. Posterior pair* of pleo- 

 poda having two rami, one of which is armed with one or more 

 hooked spines. Telson squamiform. 



The genus Podocerus, founded by Leach, differs only in specific 

 characters from Jassa of the same author, the proof of which is 

 manifested by the several species being intermingled in the cabinet 

 in the British Museum. The genus Cratopliium of Dana differs in 

 nothing from Podocerus ; and had Leach been more definite in his 

 description, there is no doubt that Dana would himself have incor- 

 porated them. 



