es ese eS! UL 
2 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 
November 21, 1883. 
J. W. Hurxs, Esq., F.R.S., President, in the Chair. 
The List of Donations to the Library was read. 
The following communications were read :— 
_ 1. “On the Skull and Dentition of a Triassic Mammal (Tritylodon 
longevus, Ow.) from South Africa.” By Sir R. Owen, K.C.B., F.RBS., 
F.G.S. 
2. “Cranial and Vertebral Characters of the Crocodilian genus 
Plesiosuchus, Owen.” By Sir R. Owen, K.C.B., F.R.S., F.G.S. 
3. **On some tracks of Terrestrial and Freshwater Animals.” 
By Prof. T. M°Kenny Hughes, M.A., F.G.S. 
The following objects were exhibited :— 
Specimens exhibited by Sir R. Owen and Prof. Hughes in illustra- 
tion of their papers. 
Two large photographs of Kimberley Diamond Mine; also a new 
Geological Map of a part of the Orange Free State, by the late 
G. W. Stow, F.G.S., exhibited by Prof. T. Rupert Jones, F-.R.S., 
F.G.S. 
Recent tracks on mud from near Mundesley, exhibited by E. T. 
Newton, Esq., F.G.S. 
December 5, 1883. 
J. W. Hue, Esq., F.R.S., President, in the Chair. 
George Jonathan Binns, Esq., Government Inspector of Mines, 
Dunedin, New Zealand; Horace T. Brown, Esq., 47 High Street, 
Burton-on-Trent ; James Dairon, Esq., 4 Garden Street, Glasgow : 
Rodolph De Salis, Esq., B.A., Portnall Park, Ascot, Berks ; Hugh 
Exton, M.D., J.P., Hon. Curator of the National Museum, Bloem- 
fontein, Orange Free State, South Africa; John Forrest, Esq., 
C.M.G., Perth, Western Australia; Prof. Bernard J. Harrington, 
