THE 



GEOLOGICAL MAGAZINE, 



NEW SERIES. DECADE III. VOL. IV. 



No. IX.— SEPTEMBER, 1887. 



o:E?,ia-in:sr-A.Xj ^LiiTioxjES. 



I. — Further Notes on the Tektiaky Entomostraca of England, 

 WITH Special Keference to those eroji the London Clay. 



By Professor T. Eupekt Jones, F.E.S., and C. Davies Sheuboen, F.G.S. 



(PLATE XI.) 



THE Tertiary Entomostraca (Ostracoda) of England, at first 

 treated of in a monograph for the Pal^ontographical Society in 

 1856, were revised in the Geological Magazine, 1870, pp. 155-159. 

 The researches of G. 0. Sars and G. S. Brady, elucidating the 

 relationships of the genera and species, gave effect in a great degree 

 to that revision ; and their continued labours have further helped us. 



Since the publication of the Eevision, fifteen years ago, besides 

 there being some additional corrections to be noticed, several 

 new species have come to hand, late research in the fossiliferous 

 deposits of Tertiary age having enabled our friends to add to the 

 collections we have made for ourselves, so that the known English 

 Tertiary forms are now nearly eighty in number. The British Post- 

 Tertiaiy species are still more numerous.^ 



We therefore oifer these " Further Notes " as of interest to 

 workers on Fossil Ostracoda. 



Besides new species, those requiring some remarks as to new 

 occurrence or corrected nomenclature are noticed in this communi- 

 cation. We especially take this opportunity of drawing attention to 

 the Ostracoda lately found in the London Clay from an excavation 

 in Piccadilly, London ; and with them we group in this paper all 

 the species known to occur in that formation, giving illustrations of 

 these London Clay forms in one plate, so as to present their fades at 

 a glance, — with the exception of two species which reached us after 

 the plate was finished, but figures of which are given in the text. 

 The order of description is arranged according to the natui'al grouping' 

 of genera adopted by Dr. G. S. Brady in his latest memoirs on recent 

 Ostracoda. 



Cypridea, Bosquet, 1852. 



This genus is described at large in the Quart. Journ. Geol. Soc. 

 vol. xli. (1885), p. 336. Eemarks on the possible alliance existing 

 between Cypridea and CMamijclotheca have been made by G. S. 



^ See the " Monogr. Post-Tert. Entom." by Brady, Crosskey, and Ptobertson, 

 Palseont. Soc. 1874. 



DECADE III. VOL. IV. — NO. IX. 25 



