PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 1 5 



January 21. 1891. 

 Dr. A. Geikie, F.ll.S., President, in the Chair. 



The List of Donations to the Library was read. 



The following communications were read : — 



1. "On the Age, Formation, and Successive Drift Stages of the 

 Valley of the Darcnt ; with Remarks on the Pala}olithic Implements 

 of the District, and on the Origin of the Chalk Escarpment." By 

 Professor Joseph Prestwich, D.C.L., F.ll.S., F.G.S., &c. 



2. "On Agrosaurus MacgiUivrayi (Seeley), a Saurischian Reptile 

 from the N.E. coast of Australia." By Professor H. G. Seeley, 

 F.R.S., F.G.S. 



3. •' On Saurodesmus Robertsoni (Seeley), a Crocodilian Reptile 

 from the Rhtetic of Linksfield, in Elgin." By Professor H. G. Seeley, 

 F.R.S., F.G.S. 



The following specimens were exhibited : — 



Flint implements, exhibited by Messrs. de B. Crawshay, B. Har- 

 rison, and A. M. Bell, in illustration of Prof. Prcstwich's paper. 



Specimens of Thenar ocrinus calli'pygus and Th. gracilis, from the 

 Upper-AVenlock Limestone of Dudley; specimens of Cyaihocrlnus 

 from the Keokuk Group, Indiana Creek, Montgomery Co., Indiana, 

 showing the tegmen and ambulacra, and especially the modified anal 

 interradial, which had been regarded by some paUieontologists as a 

 madreporite ; and a rare Crinoid cup from the Niagara Limestone 

 of St. Paul, Decatur Co., Indiana, exhibited by F. A. Bather, Esq., 

 M.A., F.G.S. 



February 4, 1891. 



Dr. A. Geikie, F.R.S., President, in the Chair. 



Zacharie de Y. Fonnereau, Esq., Glen Rosa, Carpinteria, Santa 

 Barbara County, California, U.S.A. ; AVilliam Edward Garforth, 

 Esq., Halesfield, Xormanton, Yorkshire ; Thomas H. Holland, Esq., 

 A.R.C.S., Assistant-Superintendent of the Geological Survey of India, 

 Geological Survey Ofiice, Calcutta ; Edward Keller, Esq.,B.Sc. (Lend.), 

 Southtield House, Combe Down, Bath ; Henry Lakin Lawrence, 

 Esq., Cowper's Mansions, Leete Street, King's Road, Chelsea, S.^Y. ; 

 and Richard Startin Owen, Esq., B.A., Sheen Lodge, Richmond 

 Park East Sheen, S.W., were elected Fellows of the Society. 



The List of Donations to the Library was read. 



TOL. XLVII. h 



