part 4] ostracoda prom clacton-on-sea. 627 



Appendix V. — Ostracoda from the Elephas-antiquus Bed at 

 Clacton-on-Sea. By Thomas Henry Withers, F.G.S. 



The freshwater Ostracoda submitted to me by Mr. Hazzledine 

 Warren from the JElepJms-antiquus Bed at Clacton, and now 

 presented by him to the Geological Department of the British 

 Museum, number well over five hundred specimens. An examina- 

 tion of these shows that four species only are represented, and, 

 although the shells are extremely fragile, quite a large number of 

 specimens have the two valves attached. All four species are still 

 found living in the ponds and rivers of Europe, and two species, 

 JSrpetocypris reptans and Ilyocypris gibba, are quite common 

 forms, with a very wide European distribution : they, moreover, 

 occur fossil in the Weybourn Crag and in numerous Pleistocene 

 deposits (including Grays, Clacton, and Whittlesey), while I. gibbet 

 is recorded from the Middle Hamstead Beds (Oligocene) of the Isle 

 of Wight. Of the two remaining species, Scottia broivniana is 

 known living only at Lake Fadd (Bute), and Potamocypris 

 trigonal is is known from Pegwell Bay ; but T. Rupert Jones was 

 of the opinion that this latter form was probably derived from the 

 River Stour, which empties itself into the bay. 



The numbers of specimens representing each species are. 

 approximately: E. reptans, 200; I, gibba, 100; S. broivniana, 

 200; and P. trigonalis, 50. 



Eppetocypris reptans (Baird). 



1836. Candona reptans Baird, Hist. Berwicksh. Nat. Club, vol. i, p. 99 & 

 pi. iii, fig'. 11. 



1857. Candona reptans Baird: T. R. Jones, Pal. Soc. ' Monogr. Tert. 

 Entomostraca ' p. 16 & pi. i, figs. 7 a-7 e. 



1874. Cypris reptans (Baird) : Brady, Crosskey, & Robertson, Pal. Soc, 

 ' Monogr. Post-Tert. Entomostraca' p. 128 & pi. ii, fig's. 31, 32. 



1889. Cypris reptans (Baird) : T. R. Jones, Pal. Soc. 'Monogr. Tert. Ento- 

 mostraca ' Suppl. p. 10. 



1889. Erpetocypris reptans (Baird) : Brady & Norman, Trans. Roy. Soc. 

 Dublin, vol. iv, pp. 84. 247 & pi. xiii, fig. 27. 



1900. Cypris reptans (Baird) : G. W. Midler, ' Deutschlands Siisswasser- 

 Ostracoden ' p. 58 & pi. xiv, figs. 4, 6, 12, 13, 17. 



Distribution. — liecent : Great Britain and Ireland, Norway, 

 Sweden, Germany, Tyrol, Bohemia, Palermo, South-Western 

 France, Transylvania. 

 Fossil. Pliocene : Weybourn Crag. Pleistocene : Cambridge- 

 shire (Barnwell and Whittlesey) ; Essex (Clacton and 

 Grays). Post-Tertiary: Berkshire (Newbury); Cambridge- 

 shire Fens; Lincolnshire (Casewick railway - cutting) ; 

 Yorkshire (Hornsea) ; Norfolk (Mundesley and Sidestrand ) ; 

 Hertfordshire (near Hitchin) ; Essex (Edwardstone). 



