Geological Society, 71 



(i) Anthracoptera modiolaris, Sow.,^. triangularis, Sow., A. carinatn. 

 Sow., ui, qnadrata, Sow., A. tumida, Eth. jun., A. obesa, Eth. jun., 

 A. elongata, n, sp. ; (ii) Anthracomya Adamsi, Salt., and var. expansa. 

 Hind, A. dolohraia. Sow,, A. PhiUipsii, Williamson, A. scotica, 

 Eth. jun., A. modiolaris. Salt., A. elongata, Williamson MS., A. 

 lanceolata, n. sp., A. ohtusa, Ludwig, A. angusta, n. sp., A. subcen- 

 tralis, Salt., A. pumila. Salt., A. senex, Salt., A. obovata, n. sp., 

 A. n.'sp., A. Wardi, Salt. MS. 



March 22, 1893.— W. H. Hudleston, Esq., M.A., F.R.S., 

 President, in the Chair. 



The follo"wing communicatioiis were read : — 



1. " On the Jaw of a new Carnivorous Dinosaur from the Oxford 

 Clay of Peterborough." By R. Lydekker, Esq., B.A., F.G.S. 



The Author describes a fragment of the left side of a lower jaw of 

 a Carnivorous Dinosaur from the Oxford Clay of Peterborough, 

 indicating a new genus and species, which he names Sarcolestes 

 Leedsi. 



2. " On a Mammalian Incisor from the Wealden of Hastings." 

 By R. Lydekker, Esq., B.A., F.G.S. 



In this paper a small rodent-like tooth from the Wealden of 

 Hastings, belonging to Sir John Evans, K.C.B., is described. It is 

 probably the front tooth of one of the mammalian genera found in 

 the Purbeck Beds, as may be gathered from American specimens. 



April 12, 189.3.— W. H. Hudleston, Esq., M.A., F.R.S., 

 President, in the Chair. 



The following communications were read : — 



1. " On some Palaeozoic Ostracoda from Westmoreland." By 

 Prof. T. Rupert Jones, F.R.S., F.G.S. 



In 18G5 the Author determined for Prof. Harkness some fossil 

 Ostracoda which he had obtained from the Lower Silurian rocks of 

 S.E. Cumberland and X.E. "Westmoreland, and subsequently other 

 specimens mentioned by Harkness and Nicholson in 1872. In 

 1891 Prof. Nicholson and Mr. Marr submitted a series of similar 

 microzoa from the same district; and the Author now endeavours 

 to determine their specific alliances, and revises the list of those pre- 

 viously collected. He has to notice about eleven forms of Frindtia, 

 Beyrichia, Ulrichia, ^chmina, and Cgtherclla — several of them being 

 closely allied as varieties, but all worthy of study as biological 

 groups, such as have been illustrated from other regions by writers 

 on the Ostracoda, with the view of the exact determination, if 

 possible, of species and genera, of their local and more distant or 

 regional distribution, and of their range in time. 



