the Trovilhjem Fiord. 155 



CRUSTACEA. 



I liave in an carlitr part of tliis |)aj)er made a few remarks 

 on tlie liiglier Cnistacea of the nortli of Europe and the Arctic 

 seas, and shown that the proportionate number of Braehyura 

 and Anomura rapidly decreases as we approach the Arctic 

 Ocean. The following is the list of species in the Trondhjem 

 Fiord which have been either recorded by Herr V. Storm, 

 the Curator of the Trondhjem Museum, who has done much 

 dredging, or found by myself: — 



Cftncer pag'urus, Linn. Eupa}rurus pubescens, Kroyer. 



Carcinus majniu-^, Linn. JJernhardus, Linn. 



Portumis depunitor, Linn. Galathea strif^osa, Linn. 



Hyas araneus, Linn. squamifera, Fabr. 



Inachus dorsctteusis, Penn. Galathodes tridentatus, Esmark. 



coarctatii!*, Leach. Munida rugosa, Fahr. 



Stenorhyijchus rostratus, I^inn. teuuiuiana, G. O. Sars. 



Lithodes niaia, Linn. 



It is not likely that this list can in the future be materially 

 extended, since the only species which have been met with to 

 the north of Trondhjem and not already found there are 

 Galathea nexa^ Embleton, and Galathea intermedia, Lilljeborg. 



I have drawn up the annexed Table, which is intended to 

 show the distribution of all the higher Crustacea known on 

 the coasts of Norway, including Fiumark. In the Braehyura 

 and Anomura, a glance will show as the eye passes over the 

 first ten columns how the number of species dies out north- 

 wards, while the well-filled columns after the tenth testify to 

 the large proportion of the Norwegian forms which occur 

 southwards. Passing on to the Macrura we come upon many 

 species which are not known southwards, while correspondingly 

 the Arctic columns are more tilled in. Tiie gaps in the 

 .southern columns among the Schizopoda and Cumaceaareyet 

 more conspicuous, partly because Professor G. O. Sars has 

 paid so much attention to these on the Norwegian coast, 

 partly also because very many of the species are deep-water 

 forms, living below 100 fatlioras, which are not likely to be 

 found in the shallower water which occurs round Sweden, 

 Denmark, and Britain. 



The list of species is, with a few alterations in nomencla- 

 ture and some additions made from the discoveries of the 

 Norwegian North-Atlantic Expedition, copied from that of 

 Sars, given in his ' Oversigt af Norges Ciustaceer,' 1882. 



The distribution of species has been tilled in from all the 

 leading books and papers on the Crustacean fauna of the seas 



11* 



