CRUSTACEA OF NORTHUMBERLVXD AND DURHAM 



Alonopsis elongata G. O. Sars. 



1867. Lynceus elotigatus, Norman and Brady, I.e., p. 374, 



pi. xviii., fig. I, pi. xvi., fig. 2. 



1901. Alonopsis elongata, Lilljeborg, I.e., p. 434, pi. l.xv., 



figs. 5-20. 



This is a lover of moorland lakes and tarns where there is 



some admixture of peat with the water. In Northumberland 



it is widely distributed in such situations, occurring in all the 



Northumberland lakes and many smaller pieces of water. N. 



Alona quadrangui.aris (O. F. Miiller). 



1867. Lynceus quadrangularis, Norman and Brady, I.e., 



p. 377, pi. xxi., fig. 5. 

 1867. Alona sanguinea, P. E. Miiller, Danmarks Cladocera, 



Naturhist. Tidsskrift, ser. 3, vol. v., p. 177. 

 1901. Lynceus quadrangularis, Lilljeborg, I.e., p. 448, 

 pi. Ixvi., figs. 8-17. 

 Common in lakes, ponds, and slow streams. N.D. 



Alona affinis (Leydig). 



i860. Lynceus affinis, Leydig, Naturgeseh. d. Daphniden, 



p. 223, pi. ix., figs. 65-69. 

 1867. Alona oblonga, P. E. Miiller, Danmarks Cladocera, 



Naturhist. Tidsskrift, ser. 3, vol. v., p. 175, pi. iii., 



figs. 22, 23, pi. iv., figs. I, 2. 

 1901. Lynceus affinis, Lilljeborg, I.e., p. 455, pi. Ixvi., 



figs. 18-21, pi. Ixvii., figs. 1-17, pi. Ixviii., fig. i. 



This is Lynceus quadrangularis S. Fischer and Alona 

 quadrangularis of Herrick. 



Forge Dam, Sedgefield (A. M. N.); East Bolsay Lake 

 (G. S. B.) •* N.D. 



Ai.oNA TRNUicAUDis G. O. Sars. 



1867. La'uccus tenuicaudis, Norman and Brady, I.e., p. 376, 



pi. xix., fig. 3. 

 1867. Alona tenuicaudis, P. E. Miiller, Danmarks Cladocera, 



Naturhist. Tidssk., ser. 3, vol. v.. \>. i-j(), pi. jj., fig. 20, 



pi. iii., i'lg. 24. 



83 



