176 CAEL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. HYPERIIDiE. 



Hyperia Gaiidichaudii. 



the second pair is produced; the front margin of the carpal process is shorter than half 

 the hind margin of the raetacarpus. The metacarpus of the first and second pairs is spar- 

 ingly provided with bristles; the hind margin is serrated, with simple teeth; the dactylus 

 is long. The third and fourth pairs are somewhat longer than the first two, and provided 

 with a fevv short bristles. The last three pairs are not longer than the two preceding; the 

 carpus of the fifth pair is a little longer than the tibia, and not serrated. The lateral 

 parts of the last two pleonal segments are posteriorly angulated. The peduncle of the 

 last pair of uropoda is broad. The telson is longer than broad, and siiorter than the last 

 ural segment; it is as broad as the peduncle of the last pair of uropoda and shorter 

 than half the same peduncle. 



Colour. Brownish. 



Length. 10—20 mm. 



Hab. The Southern temperate region of the Pacific; the Antarctic region: the Strait of Ma- 

 gellan. (F. M.; D. M.; S. M.) 



Syn. 1840. Hyperia Gaudichaudii, H. MILNE EDWARDS. — Histoire naturelle des Cnista- 



oés. Torne 3™^, p. 77. 

 » » M H. Nico],RT. 1849. Historia fisica y politiea de 



Chile, por Claudio Gay. 

 Zoologia. Tomo 3™, p. 245. 

 Lestrigonuf! » » Spence Bate. 1862. Catal. Amph. Crust. Brit. Mu- 



seum, p. 289, pl. 48, fig. 3. 

 Hyperia » » C. Bovalt.ius. 1887. »Systematical list of the Ain- 



phipoda Hyperiidea». Bih. 

 t. K. Sv. Vet. Ak. Halldi. 

 Bd. 11. N:o 16, p. 16. 

 » " » Th. Stebbing. 1888. »Report on the Amphipoda». 



Voy. of H. M. S. Challenger. 

 Zoology. Vol. 29, p. 1394, 

 pl. 169. 



Hyperia Gaudichaudii coines extremely near to H. Latreillei and could almost 

 with as uiuch right be called a local variety as a species, but as the small differences 

 betvveen the two species seem to be constant it inay be retained as a species by itself 

 and placed here as a link between H. Latreillei and H. galha. From the former it raay 

 be distinguished principally by the more elongated peduncles of the uropoda and the 

 shorter telson, and possibly also the serration of the metacarpus of the iirst and second pairs 

 of peraeopoda may prove to be a characteristic of specitic value. From H. galha it is to 

 be distinguished by the shorter carpal process of the first two pairs of perasopoda, by the 

 greater length of the same pairs of legs, by the narrower femora of the last three pairs 

 and by the hind corner of the first pleonal segment being rounded not angulated. 



The original diagnosis given by H. Milne Edwards in 1840 runs: 



»Antennes égales et terminées par un filet multiarticulé assez long pour atteindre le quatri- 

 éme segment du thorax. Patés et abdomen comme chez TH. de Latreille. Longueui-, environ 

 sept lignes. Habite les mers du Chili.» 



