328 M. A. Boeck o)i the Amphipoda 



Scandinavian species, I will in what follows briefly describe 

 the new ones, and only notice those already described either 

 when they are not cited by him or when there is something to 

 be added with regard to their occurrence. A more complete 

 and exliaustive desci'iption, accompanied by illustrative figures, 

 will shortly be published by me in conjunction with M. 

 Danielsen. 



The necessary materials for the arrangement of the Nor- 

 wegian Amphipoda have been partly collected by me at 

 Christiansund, Mandal, and Farsund, and partly obtained from 

 the University Zoological Collection, to which, by tlie kind- 

 ness of Prof. Rasch and M. Esmark, I have had free access. 

 In it there are Amphipoda collected on the coasts of Nordland 

 and Finmark by Sars and Esmark, on those of the district of 

 Throndhiem by Professors C. Boeck and Easch, and from the 

 district of Bergen by Sars. 



The animals investigated are thus brought together from 

 the most different parts of the country, by which means Ave 

 obtain fresh materials for the solution of questions as to their 

 geographical distribution. 



Tribe I. Hyperid^, Dana. — I have placed this tribe first, 

 as it is united by a new and remarkable form, TriscJiizosfoma, 

 with the family Orchestida3, and also with the genera Ano7i7/.v 

 and Ojn's among the Gammaridas, to which the first place is 

 usually given. 



Of this tribe few species occur on the Norwegian coast; and 

 these all belong to the second subfamily, Hyperina?, which is 

 represented by the genera Hyperia (Latr.) and Lestrigonus 

 (M.-Edw.). These two genera may be separated from each 

 other by the length of the antennae ; whilst in many species of 

 the genus Lestrigonus the seven thoracic segments are dis- 

 tinctly develojDed, and the first not amalgamated, as stated by 

 Milne-Edwards, from his sj^ecies L.fabrei^ to be characteristic 

 of the genus. In the general form of the body the two genera 

 agree, and will perhaps hereafter be combined into one. 



Genus 1. Hyper ia^ Latr. — Of this genus the well-known 

 //. Gcdha^ Mont. [LatreiUii^ M.-Edw.), occurs pretty generally 

 in large specimens of Cyanea copillata along all the west 

 coast, at least to the fjord of Throndhiem, where it was found 

 near Beian by Professors Boeck and Eascli. 



A new species, H. spinipes^ mihi, was taken at the same 

 place. This may be distinguished from the preceding species 

 by the fact that the first two pairs of legs are more strongly 

 formed, the fifth joint or hand is closely set with moderately 

 long straight and strong spines, and the angle of tlie head 



