474 Miss Edith M. Pratt on the 



undoubted member of this genns which has been found living 

 in tlie sea. As it was first found in the Forth, he thought 

 that its habitat must be in ponds and ditches which flow into 

 the Forth. Since then it has been taken by Scott in Loch 

 Morar (Inverness-shire) and in Loch Moray. 



Only a few specimens of this species were taken in April 

 and none were taken in June. 



Cyclops ofJi7iis, Sars. 



Cyclops offinis^ Brady, Brit. Copep. vol. i. j). 112, pi. xv. figs. 11-14, 

 pi. xxiv. B, figs. 10-15 ; id. Eev. Brit. Fresliw. Cyc, and Cal. p. 21, 

 pi. viii. 



Brady says that this species seems to be of rare occurrence. 

 Scott records it from some of the Scottish lakes. It was 

 taken in Bassenthwaite in April 1897, and has not since been 

 taken. 



Cyclops Kaufmanni, Uljanin. 



Cyclops Kaufmanni, Brady, Brit. Copep. vol, i. p. 113, pi. xxiv. 

 figs. 6-12 ; id. Eev. Brit. Freshw. Cyc. and Cal. p. 24, pi. ii. fig. iii. 



This species, although very limited from all accounts in its 

 distribution, was by far the most abundant species taken in 

 April 1898 ; in June it was rare. 



Cyclops phaleratuSy Koch. 



Cyclops p)haleratus, Brady, British Copepoda, vol. i. p. 116. 



This species is not very common, though fairly widely 

 distributed. It has been taken in a few of the Scottish lakes 

 by Scott, in Ireland and north of England by Brady, but has 

 not been recorded from the English lakes. It was taken in 

 Bassenthwaite in April 1898, when it was rather rare. No 

 specimens were taken in June. 



Cyclops serruJatus, Fischer. 



Cyclops serrulutiis, Brady, British Copepoda, vol. i. p. 109, pi. xxii. ; id. 

 Bev. Freshw. Cyc. and Cal. p. 18, pi. vii. fig. 1. 



This is the most common species of the genus. It occurs 

 almost universally over Britain, and has been recorded by 

 almost all continental writers. Specimens were only taken 

 in Bassenthwaite in June. 



Diaptomus castor^ Jurine. 



Brady, Brit. Copepoda, vol. i. p. 

 reshw. Cyc. and Cal. p. 27, pi. 3 



This species is generally distributed in Britain, but not 



Diaptomus castor, Brady, Brit. Copepoda, vol. i. p. 59, pi, vi. figs. 6-13 ; 

 id. Kev. Brit. Freshw. Cyc. and Cal. p. 27, pi. xi. figs. 1-6. 



