D. J. SCOURFIELD ON THE ENTOMOSTRACA OP NORTH WALES. 135 



previously been recorded as British in the lists given in the last 

 volume of the Club's Journal. 



The marsh below Llyn Fadarn and the portion of the same lake 

 cut off by the railway embankment are the only places where it 

 has been obtained. 



Cyclops serrulatus, Fischer. Undoubtedly the commonest 

 Copepod of North Wales. It seems rarely to be absent from any 

 piece of water whatever, whether large or small, high or low, 

 brackish or fresh. In the case of Llyn du'r Arddu, Snowdon, it 

 was the only species of Entomostraca that could be found after 

 most diligent search. 



Cyclops affinis, G. 0. Sars. Only seen from the side portion 

 of Llyn Padarn already referred to. 



Cyclops fimbriatus, Fischer. Recorded in Prof. Brady's " Re- 

 vision, etc.," from pools near high water, Penmaenmawr. No 

 other record. 



Cyclops eequoreus, Fischer. This is essentially a brackish 

 water species. It has only been seen from brackish pools at 

 Pensarn (G. S. B.) and Pwllheli (G. S. B.). 



Tachidius brevicomis, 0. F. Miiller. This is another exclu- 

 sively brackish water species. Brackish pond, Pensarn (G. S. B.), 

 is the only record. 



Canthocamptus staphylinus, J urine. (C minutus, Baird, 

 Brady, etc.) Curiously enough this, which is usually considered 

 to be a very common form, has only been seen in North Wales 

 from the margin of Bala Lake. 



Canthocamptus minutus, Claus. (Not G. minutus, Miiller). 

 Like the preceding this was taken from the m irgin of B-ila Lake, 

 and nowhere else. 



My friend Mr. T. Scott, F.L.S., has quite recently announced 

 the discovery of this little species in Scotland — ("Annals of 

 Scottish Nat. Hist.," July, 1895, p. 173) — otherwise it has not 

 previously been placed on record as British. 



Canthocamptus hirticornis, T. Scott. Full details of this new 

 species will be published by Mr. Scott in the Annual Report of 

 the Fishery Board for Scotland for the current year. In North 

 Wales it was obtained from the marsh near Barmouth Junction. 

 This does not necessarily indicate that it is a truly brackish 

 water species, and Mr. Scott informs me that in nearly all the 

 localities where he has found it (in Barra, North Uist, Shetland, 



