174 D. .). SCOURFlELi) OX ENTOxMOSTKACA. 



SO during the colder months. It has been found in all 'the 

 ponds. 



Cypria ophthalmica, Jurine. 



Cypria exsctdpta, Fischer. The admission of this species to 

 the Wanstead Park list rests upon a single specimen taken in 

 " The Lake." 



Cypris fuscata, Jurine. 



.'' Cypris reticulata, Zaddach. — All the specimens seen have 

 been of the " tessellata '' or immature type. Their reference to 

 G. reticulata, therefore, although probably correct, is not quite 

 certain. 



JSrpetocypris reptans, Baird. 



Gypridopsis vidua, 0. F. Miiller. This is one of the commonest 

 of the Wanstead Park ostracods, and has been found in all the 

 ponds. 



Notodromas monacha, 0. F. Miiller. 



Gandona Candida, 0. F. Miiller. 



Gandona fahceformis, Fischer. The Wanstead Park specimens 

 are not quite typical, but they are considered by Prof. Brady to 

 belong to this species. 



Gandona ahhreviata, G. S. Brady, MS. As already mentioned, 

 a description of this new species will be published by Prof. Gc. 

 S. Brady. But it may be indicated here that it is somewhat 

 similar in side view to G. puhescens, Koch, and G. rostrata, 

 Brady and Norman, while differing from them in its greater 

 breadth when seen from above. The young of this species are 

 of the " albicans " type, and it should be stated that the records 

 for September, 1890, and October, 1891, rest upon these junior 

 forms. 



Ilyocypris gibha, Ramdohr. This is probably more common 

 than would appear from the single record, for its mud-loving 

 habits prevent it from being easily found. 



COPEPODA.* 



Biaptomus castor, Jurine. This species was not recognized at 



Wanstead Park until January, 1892. It has only been obtained 



* The specific names of the animals belonging to the genera Diaptomus 

 and Cyclops are similar to those of the "Revision of the British Species of 

 Fresh-water Cyclopicla? and Calanidae," by Prof. G. S. Brady, " Nat, Hist. 

 Trans, of Northumberland, Durham, and Newcastle-upon-Tyne," Vol. xi., 

 Part; i., 1891, p. G8. This " Revision" is also publighed separately by 

 Williams and Norgate. 



