A SUPPLEMENTAL MONOGRAPH 



or TTIE 



TERTFARY ENTOMOSTRACA OE ENGLAND, 



The Tertiary Entomostraca (Ostracoda) of England, at first treated of in a 

 Monograph for the Palaeontographical Society in 1857, were revised by one of us 

 in the ' Geological Magazine,' 1870, pp. 155 — 159. The researches of G. 0. Sars 

 and G. S. Brady, with D. Robertson and others, elucidating the relationships of the 

 genera and species among recent forms, gave effect in a great degree to that 

 revision ; and their continued labours have further helped us. 



Since the publication of the Revision, eighteen 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 upwards of one hundred in number. The British Post- 

 Tertiary species are still more numerous. 1 Some of the latter were described in 

 the Monograph for year 1855 (dated on title-page 1856, but issued in 1857), and 

 what relates to them in the new researches is here noticed. 



The notices and descriptions of revised and new forms will be arranged 

 according to their alliances, and as far as possible in a Natural Order, in 

 accordance with the grouping of genera adopted by Dr. G. S. Brady in his latest 

 memoirs on recent Ostracoda. 



1 See the ' Monograph of the Post-Tertiary Entomostraca,'' by Brady, Crosskey, and Robertson, 

 Palaeontographical Society, 1874. 



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