CRUSTACEA OF NORTHUMBERLAND AND DURHAM 397 



But no indubitably adult specimens have as yet been observed, . 

 and it seems best under these circumstances to consider it asi 

 an immature form of some other species — perhaps of C. viridis. 

 The same remarks apply to Cyclops HeUeri\ 



Halicvclops .^quoreus (S. Fischer). 



1878. Cyclops cequoreus, Brady (3), vol. i., p. 119. pi. xix., 

 figs. 8-10, pi. xxi., figs. 11-17, anti (4) p. 91, pi, x., 

 fig. I (1891). 

 Claus in 1893 founded a new genus Hemicyclops with 

 Cyclops aquoreus as the type. The name, however, having 

 been previously used in a different sense by Boeck, Dr. 

 Norman has proposed to substitute for it that of Halicyclops* 

 H. ceqtioretis is essentially a brackish water species, occur- 

 ring not uncommonly in salt marshes and pools at the side of 

 estuaries. It seems to be generally distributed, but the only 

 local habitat at present known to us is Seaton Sluice, North- 

 umberland (G. S. B.) N. 



Fam. 2.— ASTEROCHERID^ 



Dermatomvzon nigripes (Brady and Robertson). 



1880. Cyclopicera nigripes, Brady (3), vol. iii., p. 54, 



pi. Ixxxix., figs. i-ii. 

 1899. Dermatojnyzon nigripes, Giesbrecht, Die Astero- 

 cheriden des Golfes von Neapel und der angrenzenden 

 Meeres-Abschnitte, Berlin, 1899, p. 77, pi. i., fig. 4, 

 pi. v., figs. 1-14. 

 A fine and well characterized species, not uncommon in 

 moderate depths of water. Off Marsden and Hawthorn in 25 

 to 27 fathoms. Off Alnmouth 50 to 59 fathoms (G. S. B.) 



N.D. 

 AsTEROCHERES LATA (G, S. Brady). 



1880. Cyclopicera lata, Brady (3), vol. iii., p. 56, pi. Ixxxix., 

 fig. 12, pl. xc, figs. 11-14. 

 One specimen among algae in a tidal pool at Roker 

 (G. S. B.) This species is normally parasitic on Echinus 



* On new generic names for some Entomostraca (Annals and Magazine of 

 Natural History, ser. 7, vol. xi., April, 1903). 



