210 THE VOYAGE OF H.M.S. CHALLENGER. 



joints of the peduncle of the lower antenna'. First pair of legs small, second pair with''the 

 wrist very much enlarged, and the claw sickle-shaped and moveable, inferior edge having a 

 small tooth with a slight notch on either side of it near the distal extremity ; claw as long 

 as the wrist, and tapering very gradually to a point." The figure shows that by " wrist" in 

 the above description the large ovate hand of the second gnathopod is intended. The 

 antenna3 are slender, the lower only about half the length of the upper. The right number 

 of legs are shown, but there are distinctly nine perieon-segments figured. The uropods and 

 telson are small. The Brit. Mus. Catalogue certifies that Goodsir's species is identical 

 with Awphifhoe peJaijica, Milne Edwards. 



1845. Kk0YER, Hexkik. 



Karcinologiske Bidrag. Naturhistorisk Tidsskrift. Ny Eaekke. Fdrste Bind. 

 Kj0benhavn, 1845. pp. 283-345, PI. I.-III. and pp. 403, 453-638, PL VI. VII. 



After a detailed account of the new species, Podalirius typicus, the new genus Podalirms is thut; 

 described : — 



" Quatiior pedum paria (annuli thoracic! primi, secundi, sexti et septimi); pedes annuli thoracici 

 qvinti prorsus rudimentarii, ungve carentes, biarticulati, natatorii (1). Mandibula palpo 

 destituta. Flagellum antennarum inferiorum biarticulatum ; articulo seoundo dimidiam 

 primi longitudinem wquante vel superante. Duo vesicularum branchiaHum paria distincta 

 (annuli thoracici tertii et quarti). Abdomen minutissimum, biarticulatum. 



" Pod. typicus: fuscus, pilosus, capite thoraceque inermibus. Long. 2'". Hab. in Asteracanthio 

 rubente." 



" Fig. prima tab. Illise exhibet annulum thoracicum quintum cum pede rudimentario et vesicula 

 branchiali (?) rudimentaria." 



P. Mayer vindicates Kriiyer's accuracy in the above account against various succeeding writers. 

 The rudimentary branchia (1) is, however, he says, as Kr0yer himself suspected, only a 

 sexual appendage (die weiblichen Geschlechtsklappen) of the female. Mayer adds that the 

 lower antennse are without " Kuderhaare," and that in Podalirius J,-roi/eri, Haller, there are 

 traces of the first and second perseopods. 



Kr0yer next describes Orchestia rirandicornis, n. s., from Valparaiso, figured Tab. 1. fig. 2. a-n, 

 and accidentally misnamed Orchestia lowjieornis on the plate. This species is omitted 

 from the Brit. Mus. Catal. It evidently belongs to Hyale. The next species, Orchestia 

 rddrodeims, n. s., is identified by Eoeck with Hyale nilssonii, Rathke, Kr0yer himself 

 having suspected tliat this and the preceding species were separated from Orchestia by their 

 longer upper anteniup, and the unguis of the maxillipeds. Orchestia platensis, n. s., tab. ii. 

 fig. 2, a-i, from Monte Video, though retained by Spence Bate as a separate species, has in 

 his opinion nothing but locality to distinguish it from Orchestia gi-yllus, Bosc, a North 

 American species. Talitrus tripiMans, n. s. 9, tab. iii. fig. 2, a-e, is identified by Boeck as 

 the female of Orchestia gammareUus. It is omitted from the Brit. Mus. Catal. Oammarus 

 anisochir, n. s., tab. ii. fig. 1, a-p, from Eio Janeiro, was transferred to Msera by Dana, who 

 thought it very near Mm-a setipes; by Spence Bate it was referred to Mclifa. Kr0yer himself 

 was inclined to make it the type of a new genus, Anisochir, but he wa.s restrained by finding 

 that the female was a true Gammm'us, and the male only distinguished from that genus by 

 having the second gnathopod on the left side strongly chelate. He considered it very near 

 to, though clearly di.stinct from, Gammarus apiwndiculatus, Sa)*. Kroyer here takes the 

 opportunity of criticising INIilne-Edwards' division of the Gammari by the shape of the eyes 

 as very artificial and perhaps untrustworthy. The absence of the accessory flagellum on the 

 upper antenna^, which separates Amphithoe from Gammarus, he considers a comparatively 



