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



and hrachijurus. Naturally no sufficient records yet exist to 

 show how these forms are distributed in this country, but from 

 my own experience it seems that C. varius is much commoner 

 than either of the other two. My doubtful record of C. macrurus, 

 from Wanstead Park (26), was most probably a male of 

 C. macruroides. Whether all these subdivisions of the old 

 C. serrulatus are really permanently differentiated forms or not 

 seems to require further investigation. 



C. macrurus Sars [Schmeil (44), Brady (36)]. 



A rather rare species, and not yet found in Ireland or Wales. 



C. prasinus (Jurine) [Schmeil (44), Brady (36) = C. magnoctavus]. 

 C. magnoctavus Brady (36). 

 A widely distributed species, and sometimes occurring in great 

 numbers, but on the whole by no means common. 



C. affinis Sars [Schmeil (44), Brady (36)]. 



C. phaleratus Koch [Schmeil (44), Brady (36)]. 

 C. canthocarpoides Lubbock (42). 



C. fimbriatus Fischer [Schmeil (44), Brady (36)]. 

 C. crassicornis Brady (35). 

 The variety "^jo^^pei " {see Schmeil, 44) also occurs in this 

 country, but I have only found it once, many years ago, at 

 Hackney Marsh. 



C. aequoreus Fischer [Brady (35)]. 



This ought not, perhaps, to be inchided in a list of fresh-water 

 Copepoda ; for although it does not occur in the sea, it is never 

 found far away from the influence of salt water. It seems to 

 occur in marshes and dykes near the sea all round our coasts. 



Harpacticidae. 

 Canthocamptus Westwood. 

 C. minutus (0. F. Miiller) [Schmeil (44) and Lilljeborg (41) = 

 C staphylinus\ 



C. minutus Baird (1), Brady (35), Scourfield (26). 

 C. staphylinus Scourfield (28, 29), Scott (20, 49). 

 The views of Canon Norman as to the correct name for this 

 (and the following species) are given by T. Scott (49), pp. 195-6. 

 In a letter recently received. Canon Norman also calls my 

 attention to the fact that Jurine himself quotes Miiller 's Cyclops 

 Tninutus as a synonym for his own Monoculus staphylinus. 



