305 



ON SOME ROTIFERA FROM SPITSBERGEN. 



the oxford university expedition to spitsbergen, 1921. 



Report No. 16. 



By David Bryce. 



{Read June 13th, 1922.) 



Figs. 1-6 in Text. 



Having already made a report (1) in 1897 on the Rotifera found 

 in mosses collected by Dr. J. W. Gregory on the occasion of Sir 

 W. Martin Conway's Expedition to Spitsbergen in 1896, I was 

 interested to learn in the autumn of last year that a further 

 series of mosses had been collected by the Oxford University 

 Expedition, and I willingly undertook their examination, being 

 curious to know if it would be possible from them to add to the 

 informa,tion already possessed concerning the Rotifera which are 

 able to Hve so far north. Since 1897 that information has been 

 materially increased. There had been two previous records of 

 Rotifera from Spitsbergen. In 1862 A. von Goes (3) recorded 

 two species of Callidina, which he had found in some moss, 

 but of which he had not determined the species. In 1869 

 Ehrenberg (2) examined some mosses, which had been collected 

 in 1867, and in them found one rotifer, Callidina alpiuni 

 ( = Pleuretra alpium), and an " egg of a rotifer " unknown. 



In my report of 1897 I was able to record the occurrence of 

 26 species, including the single species which had been seen by 

 Ehrenberg. 



Richard (9) in the following year recorded having found in 

 Spitsbergen five species, all plankton forms. 



In 1906 a large quantity of fresh moss was brought from 

 Prince Charles Foreland by Dr. W. S. Bruce, having been col- 

 lected by him during the stay there of the Scottish Spitsbergen 

 Expedition of that year. This moss, along with some smaller 

 quantities of older material from Franz Josef Land and Novaya 

 Zembla, etc., was handed by Dr. Bruce to James Murray, at that 



