SOME ROTIFERA FROM SPITSBERGEN. 



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Adineta vaga (Davis). 



Hahrotrocha insignis Bryce. 



Hahrotrocha Milnei (= Macrotrachda hidens Milne). 



Rotifer sordidus (Western). 



Rotifer tardigradus Ehrenberg. 



Hahrotrocha constricta (Dujardin). 



Macrotrachda papillosa Thompson. 



Macrotrachda habita (Bryce). 



Macrotrachda quadricornifera Milne. 



Macrotrachda concinna (Bryce). 



Macrotrachda aculeata Milne. 



Philodina nemoralis Bryce. 



Encentrum Murrayi sp. nov. 



Since the reports on the earlier series of Spitsbergen mosses, 

 etc., were published, the whole classification of the Class Roti- 

 fera has been subjected to most drastic revision and rearrange- 

 ment. I have therefore thought it desirable in the following 

 list of all the species of Rotifera which have been obtained from 

 Spitsbergen up to the present, to employ the names now in use, 

 but in all cases where these difier from the names given by the 

 authors of earlier reports, to add the latter names within brackets. 



