531 



Synopsis of the known Species of British Fresh-water 



Entomostraca. 



Part II. Copepoda. 



By D. J. ScouRFiELD, F.R.M.S. 



{Read June Idth, 1903.) 



The first part of this paper, published in April last, was 

 concerned with the animals belonging to the Cladocera. It is 

 now proposed to deal on somewhat similar lines with the species 

 of British Fresh- water Entomostraca comprised in the Order 

 Copepoda. There will thus be left for consideration in a sub- 

 sequent part only the Ostracoda, and a few species belonging 

 to the Branchiura and Phyllopoda.* As before, the principal 

 synonyms by w^hich the species are referred to in works on 

 British Entomostraca will be given, and the distribution of the 

 free-swimming forms will be shown in a table similar to that 

 prepared for the Cladocera. 



Unfortunately, there is no one book dealing with the fresh- 

 water Copepoda so completely as the " Cladocera Sueciae " 

 does with the Cladocera. The beautiful work of 0. Schmeil, 

 "Deutschlands freilebende Siisswasser-Copepoden " (44)t contains, 

 however, the majority of the forms found in the British Isles, 

 and will be followed as far as possible, though supplemented 

 occasionally by other papers, more especially by Lilljeborg's two 

 recent pubHcations, " Synopsis specierum . . . Cyclopis" (40) for 

 the species of Cyclops, and " Synopsis specierum , . . Harpacti- 

 cidarum " (41) for the Harpacticids. 



* As two species of Cladocera new to Britain, Oj^hryoxus gracilis and 

 Scapholeheris aurita, and several further records of rare species have been 

 obtained since the publication of Part I., a paragraph will also have to 

 be appended dealing with these forms. 



f The numbers in brackets refer to the list of literature printed partly at 

 the end of the present and partly at the end of the previous instalment of 

 this paper. 



