ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00450.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00451.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

摘要:

SummaryThe seven species of the higher types, enumerated first, all belong to the Olive‐coloured series, and, with the exception of the two species ofLaminaria, are well‐known European forms; I could not find any trace of a marine species belonging to the Bed series.The most complete list of Arctic Algae in a high northern latitude is that of Spitzbergen, given by Professor J. G. Agardh, comprehending 17 Olive and 20 Red; the sea in that quarter is rich in species compared with the localities visited during the late Expedition. The three marine Algæ of the Green series have a very wide distribution in European and other seas; and, with one exception, the marine Algae noticed here occur also in the Spitzbergen sea. Of freshwater species there are representatives of 14 genera; and most of them are also found in various parts of Europe. The Diatomaceæ represent 31 genera, and amount to 70 species so far as observed by me; most of them are marine, the freshwater species being few in number. The presence of these minute organisms, with their exquisitely sculptured siliceous investments, is a point of much interest in relation to the presence of certain forms of animal life. T have repeatedly received masses of such, resembling pieces of fat or of sodden bread, from ice‐floes in various parts of the Arctic sea; and in the alimentary canal of bivalve Mollusca from the. same quarter preserved in spirits, I have found abundance of marine Diatoms.Where these occur (and they are generally plentiful), this implies the possible presence of animal life, the lower forms of which are preyed upon by the higher; and thus we have a very notable and interesting chain of dependence. It is not, therefore, a matter for surprise that 16 species of Bivalves were collected beyond 80oN“. by the naturalists of the Expedition.P. T. Cleve, in a communication to the Swedish Academy of Sciences in 1873, states that the entire number of Diatoms found in the Arctic sea is 181; the species already enumerated, excluding the 12 freshwater, amount to about one third. From the same paper it would appear that those found near Spitzbergen are far more numerous than those now

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00452.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00453.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00454.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00455.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00456.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1878.tb00457.x

出版商:Blackwell Publishing Ltd    

年代:1878

数据来源: WILEY