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SYNOPSIS OF THE KNOWN SPECIES OF BRITISH 

 FRESH-WATER ENTOMOSTRACA. 



Part III. Ostracoda, Phyllopoda, and Branchiura. 



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



{Read December 18th, 1903.) 



Plate 2. 

 In this concluding part of the Synopsis of British Fresh-water 

 Entomostraca, it is principally the Order Ostracoda that will 

 occupy our attention ; but for the sake of completeness, the two 

 poorly represented groups, Phyllopoda and Branchiura, must not 

 be omitted, although it will be impossible to deal with them very 

 satisfactorily, owing to the scanty records.* 



Notwithstanding the fact that the Ostracoda possess very little 

 attraction for the majority of collectors of Entomostraca, it is 

 probably true that this group has received more attention in this 

 country than either the Cladocera or the Copepoda, with the 

 result that we possess two monographs, by Brady (56) f and by 

 Brady and Norman (57), which between them contain figures and 

 descriptions of nearly all our known species. It will only be 

 necessary, therefore, in a few instances, to give references to 

 foreign papers for information as to our native Ostracods, and 

 but a comparatively small number of synonyms need be intro- 

 duced. 



With regard to the distribution of the Ostracoda in the British 

 Isles, the same plan as before will be followed — i.e. the records 

 for each species will be summarised in a table, so that its occur- 

 rence in different parts of the country can be seen at a glance. 

 In the case of very rare forms, more definite information will 

 also be given, under the name of each species, as to where they 

 have been collected. 



* The species new to Britain, discovered since the publication of Parts 

 I. and II., and several important new records of rare species of Cladocera 

 and Copepoda, will be found in an appendix. 



t The numbers in brackets refer to the lists of literature at the end of 

 this and the two previous Parts. 



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