CRUSTACEANS 



and Norman regard as the young of Erpetocypris reptans. In their genus 

 the seta? of the second antenna; are not wanting, but they are short and 

 not plumose, and the power of swimming is lost as in Candona. From 

 the dried mud out of Headley parish there was reared a tolerably large 

 species which appears to agree with Stenocypris fischeri (Lilljeborg), 1 and 

 the much smaller Pionocypris vidua* (O. F. Miiller), of which Baird's 

 Cypris sella from a ' pond on Clapham Common ' is made a synonym by 

 Brady and Norman. 3 



For the Copepoda the records are even more scanty than those of 

 the Ostracoda, being limited to the notice of ' Diaptomus castor, male and 

 female' as having been found by the Quekett Club at Woking, 4 and 

 D. gracilis, Sars, which Dr. Brady reports as having been obtained by 

 Mr. Scourfield on Wandsworth Common. 6 



For a complete catalogue of the Crustacean fauna of Surrey materials 

 are still wanting. The gaps to be filled are large and numerous. On the 

 other hand, about many of the unrecorded species it is safe to prophesy 

 that they will be found in the county by the first naturalist who has the 

 requisite leisure for the search and knowledge for their identification. 

 The facilities for this pursuit have been greatly increased in recent years 

 by luminous writings, describing the forms, the movements, the colours 

 of various species, explaining where they are to be found and how they 

 can best be captured. If difficulties still remain, there is a certain satis- 

 faction to be derived from grappling with them ; and the natural beauty 

 and interest of the species when found and examined may be guaranteed 

 to give the explorer for his pains an ample and sure reward. 



1 See Brady and Norman, Tram. Royal Soc. Dublin, ser. 2, vol. iv. p. 8 1 ; and Sars, Arch. Naturv. 

 vol. xviii. p. 4 (1896). 



* British Entomostraca, p. 158. 3 Trans. Royal Soc. Dublin, ser. 2, vol. iv. p. 89. 



4 Q. M. C. ser. 2, vol. ii. p. 34 (1884). 



6 Nat. Hilt. Trans. Northumberland, etc. vol. xi. pt. I, p. 32 (1891). 



I 97 



