SIPHONCECETES WHITE!. 467 



A MPniPODA . POBOOERJDES. 



NATATORIA. 



SIPHONCECETES WHTTEI. 



Sjiecifc character. Superior antennae Laving the peduncle but little 

 longer than tlie ceplialon ; the flagellum short, and apparently exarticulate. 



Inferior antennce Gnathopoda with the carpi and propoda 



continuously long-ovate ; dactylos of the second pair serrated. First two 

 pairs of pereiopoda having the dactyla straight. 



Length ^g inch. 



Cerapus Whitei. Gosse, Nat. Rambles, Devonshire, p. 383. 



pi. xxii. fig. 12. Mar. Zool. p. 140, f. 253. 



White, Brit. Crust, p. 191. 

 Siplwncecclus Whitei. Spence Bate, Cat. Amph. Brit. Mus. p. 270, 



pi. xlv. fig. 10. 

 Siphona:cetus Kroijcranus. Spence Bate, Ann. Nat. Hist. 2 ser. xix. 



p. 149. White, Hist. Brit. Crust, p. 196. 



Our knowledge of this species is limited. The 

 specimen which we examined, and originally described 

 as S. Kroycranus, has the superior antennse shorter 

 than either the figures of Kroyer or of Gosse ; we 

 have, nevertheless, associated both under one name, 

 and it is not improbable that they may prove to be 

 females of S. typicus. The almost exarticulate flagellum 

 of the upper anteimae, and the more strongly armed 

 second pair of hands, may, possibly, be characteristics 

 of the female sex, but until more specimens are obtained 



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