314 DAVID BRYCE ON 



not surprising in view of tlie position whence tlie moss was 

 taken. 



L 19. Very few rotifers were seen in two carefully prepared 

 washings ; all were dead except a single example of : 



Pleuretra Brycei (Weber). 



L 19. From tlie damp tundra, two washings produced very 

 few rotifers. Those revived were : 



Adineta vaga (Davis). 



Adineta harbata Janson. 



Macrotrachda aculeata Milne. 



Habrotrocha Milnei {= Macrotrachela bidens Milne). 



L 21. This moss produced a better series of species and a fair 

 proportion of living individuals after soaking for 2 to 3 hours; 

 one dead Ploimid was recognised as : 



Monostyla cornuta (Miiller). 



The following Bdelloid species revived : 



Ceratotrocha cornigera (Bryce). 

 Habrotrocha insignis Bryce. 

 Habrotrocha elegans (Milne). 

 Macrotrachda habita (Bryce). 

 Rotifer tardigradus Ehrenberg. 

 Philodina acuticornis Murray. 

 Pleuretra Brycei (Weber). 

 Adineta vaga (Davis). 

 Mniobia russeola (Zelinka). 



There were also seen several Desmids, some Nostoc, several 

 water-bears (of at least two species), several eel-worms, and a 

 few Rhizopod tests. Several of the water-bears and eel-worms 

 came back to active hfe. 



L 25. This material consisted mainly of one large tuft or 

 " slab " of close-growing ground -moss with tightly packed 

 upright stems ra?ther more than an inch high and perhaps the 

 growth of several seasons. It proved to be by far the most 

 productive for Rotifera, although the number of individuals seen 

 was quite moderate. Many washings v,^ere made and the fol- 

 lowing species revived : 



