SOME KOTIFERA FEOM SPITSBERGEN. 311 



species. From Z 2 were revived three examples only of Habro- 

 trocha insignis, but several dead specimens of Pleuretra alpium 

 were also seen. In Z 3 and Z 4 I found only a few dead indi- 

 viduals, amongst wliicli I could recognise two as being the var. 

 hirundinella of Macrotrachela plicata. In these mosses I saw 

 very few specimens of eel-worms, rhizopods, or tardigrades, and 

 of these groups no single individual revived. The exceedingly 

 poor results obtained from these gatherings are perhaps due to 

 the bare positions from which they appear to have been taken. 

 Rotifers revived : 



Habrotrocha insignis Bryce. 



Mniohia russeola (Zelinka). 

 Not revived : 



Pleuretra alpium (Ehrenberg). 



Macrotrachela plicata (Bryce), var. hirundinella Murray. 



Habrotrocha sp. (4 -toothed, but not recognisable). 



Cap Boheman : a rocky point of land jutting out into Isfjord 



on the north side of the fjord. It is more or less flat and mostly 



sandstone rock. The pond from which the sphagnum was taken 



lay about | mile from the coast, less than 50 ft. above sea-level. 



Mosses collected early July, 1921. 



Sphagnum sp. 

 Cynodontium virens Hedw. 

 Hypnum brevifolium Lindb. 

 H. cordifolium Hedw. 



From the bank of a pool. 



As the sphagnum was dry when received, I had little expec- 

 tation of securing any living specimens from it, but I took my 

 earliest opportunity of washing a portion, viz. early in January. 

 I found in it a very few dead rotifers, some dead tardigrades 

 (and eggs) and several eel-worms. Three moss-mites, apparently 

 of different species, had alone retained vitality. The ground 

 moss I examined early in June, and found a few rotifers, mostly 

 dead, those which revived representing the four species named 

 below. One example of Mniobia russeola was infected by an 

 endo-parasitic worm which is described later. 



Rotifers revived : 



Adineta vaga (Davis). 

 Rotifer sordidus (Western). 



JouRN. Q. M. C, Series II.— No. 88. 22 



