THE ECTOPARASITES OF THE RED GROUSE 367 



Dr Wilson and Mr Fryer " tow-netted " some of the moor streams in April 

 1907, and found a certain number of the nauplius larva, probably of Cyclops, and 

 a certain but small number of adult Cyclops. The numbers were, however, meagre, 

 and tow-nettings later in the summer yielded an even more unsatisfactory " bag." 

 None of the Crustacea when examined microscopically showed any cysts, and as 

 they were few in number and quite cystless, it seems improbable that the source 

 of the tapeworm infection lies here. 



Mr D. J. Scourfield, who kindly looked through some of these tow-nettings, 

 tells me he found the following species of Entomostraca : 



CLADOCERA. 



Chydorus sphcericus (0. F. M.), the most abundant form. 

 Alonella nana (Baird, Norman & Brady), frequent. 

 Alonella excisa (Fisch.), frequent. 



Acantholeberis curvirostris (0. F. M.), a fair number, with some cast 

 ephippia. 



COPEPODA. 



Cyclops nanus Sars, a few. 



Cyclops languidus Sars, a single specimen only seen. 



Cyclops vernalis Fisch., again only one specimen was seen. 



I subjoin three more lists of tow -netted fresh water Entomostraca from three 

 different lochs. These were collected and identified by Mr Wm. Evans, who has 

 kindly put them at my disposal, and they clearly indicate the sort of surface fauna 

 which may be obtained from the lochs on the Scotch moors in early autumn. 



LIST I. 



i 



From Loch Rusky, a moorland loch a few miles from Callander, which was 

 tow-netted on September 16th, 1906. 



CLADOCERA. 



Simosa vitula (0. F. M.). 

 Eurycercus lamellatus (0. F. M.). 

 Alonopsis elongata (G. 0.) Sars. 

 Alona affinis Ley dig. 

 Chydorus sphcericus (0. F. M.) 



