112 PEOCEEDINGS OF THE GEOLOGICAL S0CIJ:TY. 



•• These Ordovician chert-beds, which are, I believe, of consider- 

 able thickness, are thus shown to be of organic origin, and to bt; 

 composed principally of E-adiolarians, sponge-remains being appa- 

 rently rare in them, and in this feature they differ from the Yoredale 

 Cherts. 



"This is the first definite notice of the presence of undoubted 

 Kadiolarians in Palaeozoic strata. To Prof. Dr. H. A. Nicholson*, 

 F.L.S., F.G.S., of Aberdeen, belongs the credit of having first noticed 

 these organisms in the Chert ; but in his specimens only casts without 

 structural characters were preserved, and they were conjectured to 

 be Eadiolarian — a conjecture which is now shown to be cori-ect." 



March 12, 1890. 



.J. W. HuLKE, Esq., F.R.S., Vice-President, in the Chair. 



George Sweet, Esq., Brunswick, Melbourne; and Mount Eat- 

 navelacbaria, Esq., Assistant-Conservator of Forests, H.H. the 

 Nizam's Service, Hyderabad, Deccan, were elected Fellows of the 

 Society. 



The List of Donations to the Library was read. 



The following communications were read : — 



1. "On a Deep Channel of Drift in the Valley of the Cam, 

 Essex." By W. Whitaker, Esq., B.A., F.E.S., F.G.S. 



2. " On the Monian and Basal Cambrian Eocks of Shropshire." 

 By Prof. J. F. Blake, M.A., F.G.S. 



3. " On a Crocodilian Jaw from the Oxford Clay of Peter- 

 borough." By E. Lydekker, Esq., B.A., F.G.S., &c. 



4. " On two new Species of Labyrinthodonts." By E. Lydekker, 

 Esq., B.A., F.G.S., «&c. 



The following specimens were exhibited : — 



Eock-specimens and microscopic sections, exhibited by Prof. J. 

 F. Blake, F.G.S., in illustration of his paper. 



Specimen and cast of Crocodilian Jaws, exhibited by E. Lydekker, 

 Esq., F.G.S., in illustration of his paper. 



Human skull, found 27 feet below the surface in the Manchester 

 Ship-canal excavations in sand, exhibited on behalf of Mr. Aber- 

 nethy, the Consulting Engineer, by Capt. A. \V. Stiffe, F.G.S. 



* Trans. Edinb. Geol. Sec. vol. vi. part i. p. 56 (1890). 



