﻿Arctic Rotifers collected hy Br William S. Bruce. 123 



than in any of the other districts examined, but it falls short 

 of that obtained by Mr Bryce. The two lists will be com- 

 pared afterwards.^ 



As is usual when Rotifers are collected from moss, the 

 Bdelloida preponderated over the other orders. 



(Ecistes serpentinus, Gosse. Prince Charles Foreland, one 

 small example, living, no doubt hatched from an egg. 



Bhilodina hrevipes, Murray. One large example, living, 

 Prince Charles Foreland. 



B. alpium (Ehr.) (4). Prince Charles Foreland. 



P. hrycei (Weber) (8). Prince Charles Foreland, numerous. 

 The form found is slightly different from the type, as there 

 are two spines on the preanal segment to which Weber does 

 not refer. There are 10 spines in the principal row, and 

 in front of the spine, at each end of the row, there is another 

 spine on the same lateral skinfold. 



Callidina angusticollis, Murray (7). Prince Charles Fore- 

 land. Several cases. 



G. papulosa, Thompson. Recherche Bay. This is one of 

 the small number of Bdelloids which can be recognised, even 

 when dead, by characteristic processes on the trunk. 



C. plicata, Bryce (2). Recherche Bay and Prince Charles 

 Foreland. In the latter locality the type was common. In 

 Recherche Bay an interesting variety was found, which has 

 the processes on the posterior hood produced into long tails. 

 The same form is common in Scotland, and especially on 

 mountain tops. 



C. hidens, Gosse. A fine active species was abundant in 

 Prince Charles Foreland. It appeared to me to be a distinct 

 species from any known to me. Gosse's species, C. hidens, is 

 insufficiently described, and is unrecognisable. I learn that 

 Mr Bryce intends to establish Gosse's name, by describing 

 more fully an animal which answers Gosse's description as 

 far as that goes. From Mr Bryce's drawings of the proposed 

 type of C. lidens, which he kindly sent to me, I believe our 

 Spitsbergen animal is the same, and record it under that 

 name. 



^ The special interest in Dr Brace's collection lies in the fact that no 

 material had previously been recorded from Prince Charles Foreland. 



