THE GEOLOGICAL MAP OF THE WORLD. 347 
panied the expedition, has published a geological map of the route 
traversed by the English army. For along time geologists have 
disagreed as to the age of a great sandstone formation designated 
generally under the name “ Nubian Sandstone,” and in the first 
edition of the “Geological Map of the World,” I have referred 
these sandstones to the New Red Sandstone (Dyas and Trias) 
by basing my conclusions on the lithology and on a piece of fossil 
wood found in Egypt, and described by Professor Unger. M. 
Louis Lartet, jr., after a journey in these regions, believed that he 
had discovered a complete and exact solution of the age of these 
sandstones; and in his work entitled “ Essay on the Geology of 
Palestine, Egypt and Arabia,” Paris, 1869, as also in a note in- 
serted in the: “ Bulletin of the Geological Society of France,” vol. 
XXv, p. 490, under the title of “On a Special Formation of Red 
Sandstones in Africa and Asia” he refers them not only to the 
Cretaceous formation, but even the horizon of the Gault and of the 
Glauconian chalk; and on a geological map he shows this forma- 
tion extending from Lebanon, by Sinai, to the Cataracts of As- 
souan as far as Karthoum. Mr. Blanford has indicated these 
Nubian Sandstones, which he has named Adrigat Sandstone, under 
some fossiliferous limestones containing a Jurassic fauna and 
which he has named “ Antalo Limestone,” and he is led to regard 
the Nubian Sandstones as of the age of the New Red Sandstone 
(Dyas and Trias). As regards Sinai, two English observers, 
Messrs. Wilson and Holland have shown in these Nubian Sand- 
Stones the presence of some carboniferous fossils, or at least of 
fossils of the age of the Dyas. Thus the determination of the 
epoch of the New Red Sandstone for the Nubian Sandstone ap- 
pears to be confirmed. 
The geology of India has continued to be the object of very im- 
portant researches on the part of Thos. Oldham and his assistants 
in the geological survey of this vast empire. My friend Mr. Old- 
ham has kindly sent me a manuscript map which modifies greatly 
the results which I had accepted for the first edition of my map. 
hina, we have had some data quite exact on several ae 
thanks to the researches of Messrs. Kingsmill, the Abbe Davi 
Pumpelly and Bickmore. Professor E. Beyrich has seiblinhied á a 
Work on the Island of Timor, and M. Jules Garnier has given a 
geological map of New Caledonia. 
New Zealand, thanks to the researches of Messrs. Ferdinand Von 
