192 



Permian, and Mesozoic ages, covered un conformably by Cainozoic and 

 modern formations. In some of the rivers of this division are rich 

 gold-placers. The third division is the delta on the eastern coast. 

 Evidence furnished by alluvial deposits and coral-reefs indicates 

 recent subsidence uutil a few years ago, when elevation commenced. 

 The fourth division is on the western side of the first (central) 

 division. Its rocks are generally similar to those of the second 

 division. In some places dykes are connected with lava-flows. 

 In the valley of the Rio Viejo is a Tertiary mammaliferous de- 

 posit with Tillodonts, &c. The fifth division occupies Western 

 Nicaragua, and contains several small crater-lakes of the Vicksburg, 

 Torktown, and Sumter periods ; all the post-Mesozoic Nicaraguan 

 volcanoes are in this division. 



Details of the economic products, the volcanic phenomena, and 

 the glaciation of the country are furnished, and the remains of Neo- 

 lithic man are recorded. 



9. " Microzoa from the Phosphatic Chalk of Taplow." By F. 

 Chapman, Esq., F.R.M.S. (Communicated by Prof. T. Rupert Jones, 

 r.R.S., E.G.S.) 



10. " On the Basalts and Andesites of Devonshire, known as 

 Felspathic Traps." By Bernard Hobson, Esq., M.Sc, F.G.S. 



11. " Notes on Recent Borings for Salt and Coal in the Tees Salt- 

 District." By Thomas Tate, Esq., F.G.S. 



The following specimens were exhibited : — 



Maxilla and other bones of Euskelesaurus Browni (Huxley), col- 

 lected by Alfred Brown, Esq., of Aliwal North ; Yertebrae of 

 Eushelescmrus preserved in the Albany Museum ; Lower jaw and 

 cervical vertebra of Eushelesaums Browni, collected at the Kraai 

 River ; Remains of Massospondylus Browni (Seeley), collected by 

 Alfred Brown, Esq., at the Telle River ; Hind-limb of Hortalotarsus 

 from Barkly East, preserved in the Albany Museum ; photograph 

 of the Skeleton of Hortalotarsus ; the Mesosaurus tenuidens from 

 Albania, preserved in the South African Museum ; and the Skeleton 

 of Eunotosaurus africanus from Welte Vreden, exhibited by Prof. 

 H. G. Seeley, F.R.S., F.G.S., in illustration of his three papers. 



Rock-specimens and microscopic sections, exhibited by J. Postle- 

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



Rock-specimens and microscopic sections, exhibited by Bernard 

 Hobson, Esq., M.Sc, F.G.S., in illustration of his paper. 



Specimens of Carboniferous Murchisonia, exhibited in illustration 

 of Miss Donald's paper. 



Specimens from the Phosphatic Chalk of Taplow, exhibited by F. 

 Chapman, Esq., in illustration of his paper. 



Specimens of Tertiary (?) Plant-remains and Gasteropoda from the 

 Thingadau Coalfield, Burmah, exhibited by Dr. Walter Saise, F.G.S. 



