40 D. J. SCOURFIELD, SYNOPSIS OF THE KNOWN SPECIES OF 



occasionally in this country, although very rare. In addition to 

 the records given by Baird (1), it has been taken at Tillrnire, 

 near York, by a brother of Professor Brady in 1862 ; at Seaford, 

 Sussex, by Mr. H. Maxwell Lefroy, in 1899; and near Brocken- 

 hurst, in the New Forest, in March, 1900, and October, 1901, by 

 Mr. G. T. Harris. I am indebted to Canon Norman for the two 

 first-mentioned records. 



BRANCHIURA. 

 Argulus 0. F. M tiller. 

 A. foliaceus (L.) [Baird (1), Clark (60), Wilson (69)]. 



The records of the occurrence of this well-known fish parasite 

 are not very satisfactory, but there is every reason to suppose 

 that it occurs in all parts of the country. It certainly occurs in 

 Ireland and Scotland as well as in England (see 1, 15, 21a, 48). 



A. coregoni Thorell [Wilson (69)]. 



Canon Norman possesses specimens of this species which were 

 taken by Mr. Dodds on the Barbel, in Leicestershire. It has not 

 previously been placed on record as British. 



APPENDIX. 



The three following species have been added to the known 

 British fauna since the publication of the previous parts of this 

 Synopsis.* 



CLADOCEBA. 



Daphnidae. 



Scapholeberis Schoedler. 

 S. aurita (Fischer). 



Mr. R. Gurney has recently found this fine species in Norfolk, 

 and has published a short account of its habit of using the sur- 

 face-film of water for support, etc., in the Annals and Magazine 

 of Natural History (61). It has been obtained from the following 

 localities : Pond, at Herringfleet ; Ditch, at S. Walsham ; and 

 ( latfield Fen. 



This species is described and figured by Lilljeborg in the 

 ( 'ladocera Sueciae. 



In a recent paper (63) Mr. W. F. de V. Kane has recorded Bosmina 

 dollfusi Moniez from three Irish lakes. If this were a good species it 

 would be an addition to our fauna, but I consider it merely as a form of 

 Ji. obtu.sirostris, 



