190 Reports and Proceedings — Geological Society of London. 



and important researches in Palaeozoic Palaeontology : and to Dr. H. 

 Woodward, F.R.S., in recognition of his work on Fossil Crustacea, 

 etc. 



The President then proceeded to read his Anniversary Address, 

 which was devoted to the examination of the structure of limestones, 

 and the means presented, especially by optical investigation, for 

 determining the origin of their constituent particles. 



II.— February 26, 1879.— Henry Clifton Sorby, Esq., F.E.S., 

 President, in the Chair. — The following communications were 

 read : — 



1. A copy of a Letter from the late Acting Governor of the 

 Falkland Islands, relating to the overflow of a peat-bog near Port 

 Stanley, in East Falkland. Communicated by H.M. Secretary of 

 State for the Colonies. 



2. " Note on PoiMlopleuron Buchlandi, of Eudes Deslongchamps 

 (pere), identifying it with Megalosaurus BucMandi." By J. W. 

 Hulke, Esq., F.E.S., F.G.S. 



The author stated that the genus Poikilopleuron was founded by 

 Deslongchamps, after much hesitation, to receive some Megalosauroid 

 fossils found in a quarry near Caen ; and that he gave them the 

 specific name " BucMandi " with the view of facilitating the union 

 of the two genera, should this be found necessary. The author 

 reviewed the evidence on which the genus Poilcilopleuron rests, 

 indicating the close resemblance of the remains to those of 

 Megalosaurus, and showing that a medullary cavity exists in the 

 vertebrae of the latter, thus getting rid of the most important 

 difference between the two supposed genera. The author's con- 

 clusion was that PoiMlopleuron and Megalosaurus BucMandi were 

 identical. 



2. " Note on a Femur and a Humerus of a small Mammal from 

 the Stonesfield Slate." By H. G. Seeley, Esq., F.L.S., F.G.S., 

 Professor of Geography in King's College, London. 



The author described a small femur and humerus preserved in 

 slabs of Stonesfield Slate in the collection of the British Museum, 

 to which they were presented many years ago by Mr. Pease Pratt. 

 The bones nearly correspond in size, and, in the absence of evidence 

 to the contrary, the author preferred to regard them as possibly be- 

 longing to the same animal. From their characters the author was 

 inclined to associate them with the jaw known as Phascolotherium, 

 and to believe that they represented a special, probably insectivorous, 

 monotreme type, with indications of marsupial tendencies, such as, 

 on the hypothesis of evolution, might well be expected to occur early 

 in the development of the Mammalia. 



3. "A Review of the British Carboniferous Fenestellidae." By 

 G. W. Shrubsole, Esq., F.G.S. 



In this paper the author gave the results of his investigation of 

 the Fenestellidae from the upper beds of the Carboniferous Lime- 

 stone on Halkin Mountain, in Flintshire. He stated that the de- 

 scribed Carboniferous species of Fenestella now number 24, of which 



