CRUSTACEA OF NORTHUMBERLAND AND DURHAM 325 



however are not that species, but the male of the present 

 one. N.D. 



Periambus typicus {KxQyer)=CapKena typica B. & W. 



Off Alnmouth, 39 fathoms, off Cullercoats in 20-25 fathoms, 

 and off Souter Point, Co. Durham, in 21-39 fathoms (A. Mk.) ; 

 30 miles off Sunderland, 40 fathoms (G. S. B.) N.D. 



Sub-Class III.— ENTOMOSTRACA 



Order VII.— BRANCHIOPODA 



Sub-Order L— PHYLLOCARIDA 



Fam. I.— NEBALIID^ 

 Nebalia bipes Fabr. 

 Not common, but occasionally taken off the coast. N.D. 



Sub-Order IL— CLADOCERA 



The works and papers chiefly to be consulted with relation 

 to the Cladocera are : — 



1. Baird (W.). Natural History of British Entomostraca, 



1850. 



2. Norman (A. M.) and Brady (G. S.). Monograph British 



Entomostraca of Families Bosminidse, Macrothricidse, 

 and Lynceidse. Nat. Hist. Trans. Northumberland and 

 Durham, vol. i., 1867, pp. 354-408, pis. xviii.-xxiii. 



3. Brady (G. S.). British species of Entomostraca belong- 



ing to Daphnia and other allied genera. Trans. Nat. 

 Hist. Soc. Northumberland and Durham, vol. xiii., 

 1898, pp. 217-248, pis. vii.-x. 



4. Lilljeborg (W.). Cladocera Sueciae (Konig. Gesellsch. 



Wissensch,, Upsala), 1901. 



The last work is indispensable to the student of the 

 Cladocera. All the following species will be found described 

 and amply figured in it. References need not be given in 

 general to Lilljeborg, but they will be given to the best figures 

 of the species in papers by British authors. 



