Entomostraca of Lake Bassenthwaite. 473 



abundance near the surface all over the portion of the loch 

 examined. 



Beck took tiiis species in the English lakes. It was very 

 rare in Bassenthwaite in April, but very abundant and. 

 universally distributed at the surface and some little distance 

 below the surface in June, with eggs, embryos, and larvae in 

 all stages of development. 



C OPEPOD A. 



Cyclops signatuSj Koch. 



Cyclops siynatus, Brady, Brit. Copep. vol. i. p. 100, pi. xvii. ligs. 4-12 ; 

 id. Revision Brit. Freshwater Cyclopidse and Calanidae, p. 6, pi. ii. 

 tig. 5. 



Examples with serrated and with simple ridge on antenna 

 were taken. They are supposed to represent different stages 

 in development [Herrick). This species is widely distri- 

 buted and common in Britain. 



Cyclops strenuus, Fischer. 



Cyclops strenuus, Brady, Brit. Copep. vol. 1. p. 104 ; id. Rev. Brit. 

 Freshw, Cjc. and Cal. p. 8, pi. ii. 



Widely and generally distributed in Britain, but not very 

 common. 



Cyclops Thomasi, Forbes. 



Cyclops Thomasi, Brady, Fresliw. Cyc. and Cal. p. 15, pi. vi. figs. 1-4. 



This is not a common species. Scott has taken it in many 

 of the Scottish lakes, but it seems to occur nowhere in great 

 abundance. It was rare in Bassenthwaite in April, this being 

 the first time that it has been recorded from the English lakes. 

 No specimens were taken in June. 



Cyclops insignis, Claus. 



Cyclops insiynis, Brady, Brit. Copep. vol. i. p. 108, pi. xxi. ; id. Rev. 

 Brit. Freshw. Cyc. and Cal. p. 18, pi. vii. 



Brady describes it as being one of the less common species 

 ot Cyclops. I have not found it recorded from the Scottish 

 lakes. Specimens of this species were fairly common in the 

 middle of the lake in April, but rare in June, 



Cyclops Eioartij Brady. 



Cyclops Excarti, Brady, Rev. Brit. Freshw. Cyc. and Cal. p. 22. 



Scott has taken this species in a small bay near Queens- 

 ferry, Firth of Forth. Brady remarks that this is the only 



