BRITISH FRESH-WATER ENTOMOSTRACA. 441 



Camptocercus Baird. 

 C. rectirostris Schoedler. 



C. macrurus Baird (1); Norman k Brady (17); Scourfield 

 (26, 28); Scott (20, 21 A). 

 There seems no doubt that the form referred to by Baird, 

 Norman & Brady, etc., as C. macrurus is really C. rectirostris, 

 and not C. macrurus as defined by Lilljeborg. 



It cannot be called a very common species. Not yet recorded 

 from Ireland 



C. lilljeborgii Schoedler. 



I took this species in Norfolk (in the channel leading from 

 Stalham to Barton Broad) in 1898. It is now recorded as British 

 for the first time. 



Acroperus Baird. 

 A. harpae Baird. 



Lynceus har^xie Norman & Brady (17). 

 The variety previously recorded by me (29) is not at all 

 uncommon, but I am doubtful whether it represents a permanently 

 distinct race. 



A. angustatus Sars. 



This I found in company with Camptocercus lilljeborgii. It also 

 is now recorded for the first time as British. 



Alonopsis Sars. 

 A. elongata Sars. 



Lynceus elongatus Norman & Brady (17). 

 A common species in the north of England, North Wales, 

 Scotland, and some parts of Ireland, but I have never yet taken 

 a specimen in the south and east of England. 



Alona* Band (= Lynceus Lilljeborg). 



A. quadrangularis (O. F. Miiller). 



Alona quadrangularis Baird (in part) (1). 

 Lynceus quadrangularis Norman & Brady (in part) (17), 

 Hodgson (10). 



* I have preferred to retain the name Alona, as it appears uncertain 

 whether Lynceus can be properly used for these creatures. See the Rev. 

 T, R. R. Stebbing's paper already mentioned. 



