MK. G. S. BRADY ON ENTOMOSTRACA, ETC. 361 



XX. — Notes on Entomostraca taken chiefly in the Northumber- 

 land and Durham District (1869). By George Stewardson 

 Brady, C.M.Z.S., &c. (Plates XII.-XIV.) 



During the past year my attention — so far as Natural History 

 is concerned — has been chiefly directed to the Entomostraca of 

 tidal rivers ; but having had some not altogether unproductive 

 opportunities of collecting in localities of a different character, I 

 propose now to lay the results of these "horse subsecivee" be- 

 fore the Club. 



The gatherings which I have to notice are — 



1. From between tide-marks : at Sunderland, and at Boul- 

 mer, near Alnwick. 



2. From fresh water at Fulwell Cemetery, Sunderland, 



3. Marine ; from a depth of 15-30 fathoms off the Durham 

 coast. 



BOULMER AND SUNDERLAJiD. 



These gatherings consisted of the muddy sand which is found 

 not unfrequently coating flat shelving rocks, and matted together 

 in many cases by dwarf filamentous Algse of such genera as 

 Sphacelaria, Polysiphonia, Callithamnion, &c. As a general 

 rule, the tidal rocks of our district are too much storm-beaten 

 to allow of their harbouring any great quantity of movable de- 

 posit of this kind, and it is only in somewhat sheltered nooks 

 that the requisite conditions can be found. Several interesting 

 species, new to the district, occurred in these localities, and it 

 is not less interesting to note the occurrence abundantly in a 

 living state of several which we had previously known only 

 from the shell : in this category we may notice Cytherura cellu- 

 losa and several other species of that perplexing genus. The 

 most noteworthy of the newly found species are Cythere Robert- 

 soniy Cytherura similis, Jlavescens, anyidata, undata, and gibba, 

 Paradoccostoma pulchellum, hibernicum, and Fischeri. 



The following is a complete list of the species obtained, the 

 asterisks indicating their comparative abundance, * * * beinc 



