BRITISH FRESH-WATER ENTOMOSTRACA. 437 



Henick. It is, however, certainly C. ajffinis Lilljeborg, and the 

 latter name has therefore been adopted. It is a rare British 

 species, the only localities known to me being Higham Park, 

 Essex ; Potter Heigham, Norfolk ; and Penicuik, Midlothian, 

 w^here it was found by Dr. and Miss Sprague (33). 



C. laticaudata P. E. Miiller. 



Da'phnia rotunda Baird (in part) (1). 

 C. rotunda Scourfield (26, 29), Scott (20), Hodgson (10). 

 All the specimens that I have seen belonging to the " rotunda " 

 group have been of this form. It seems rather a pity that the 

 name C rotunda cannot be used for it rather than for the 

 following. 



C. rotunda G. 0. Sars (? Straus). 



Daphnia rotunda Baird (in part) (1). 

 I do not know of any certain recent records of this form, but 

 Baird's fig. 4a, Tab. X., perhaps represents this species. 



Moina Baird. 

 M. rectirostris (Leydig). 



A comparatively rare species, even in England, and not yet 

 recorded from Scotland, Ireland, or Wales. It occurs only in 

 small, shallow ponds and pviddles with very turbid water. 



M. brachiata (Jurine). 



Baird (1) recorded this from a pond at Blackheath, but I have 

 never seen specimens nor heard of them being taken, and cannot 

 therefore give an illustration of the species, notwithstanding the 

 fact that it is not to be found in the " Oladocera Sueciae." It 

 does not differ very much, apparently, from the foregoing species, 

 but the ephippium is stated to contain two eggs instead of one. 



M. banffyi Daday. 



This is another species not recorded in the "Oladocera Sueciae." 

 Its chief characteristics are : — Head without indentation, more 

 or less hairy, especially at the back (the valves are also hairy, but 

 not so noticeabl}^) ; shell-mai'kings very similar to Simocephalus ; 

 antennules covered with scale-like markings and hispid ; second 

 antennae very large and densely hairy ; post-abdomen of the 



JouRN. Q. M. C, Series II.— No. 52. 29 



