46 REPRODUCTION OF THE OSTRICH IN EUROPE. 
Professor Emmons has long maintained, on evidence that has been 
much disputed, that rocks in Vermont, which in June 1859 I for the 
first time saw and recognized as equivalent to the magnesian part of 
the Quebee group, are older than the Birdseye formation ; the fossils 
which have this year been obtained at Quebec pretty clearly demon- 
strate that in this heis right. It is at the same time satisfactory to 
find that the view which Mr. Billings expressed to you in his letter of 
the 12th July, to the effect that the Quebec trilobites appeared to be 
about the base of the second fauna, should so well accord with your 
opinions; and that what we were last spring disposed to regard at 
Georgia, (Vermont) as a colony in the second fauna, should so soon be 
proved, by the discoveries at Quebec, to be a constituent part of the 
primordial zone. 
I am, my dear Mr. Barrande, 
Very truly yours, 
Mr. Joacum™ Barranve, W. E. LOGAN. 
Rue Méziére, No. 6, 
Paris. 
ON A SECOND INSTANCE OF THE REPRODUCTION OF 
THE OSTRICH IN EUROPE. 
COMMUNICATION ADDRESSED TO M. IS. GEOFFROY ST. HILAIRE, 
BY PRINCE DEMIDOFF. 
(Translated from the Comptes Rendus, of August 17, 1860.) 
My zoological establishment at San-Donato, has just afforded me 
a second example of the reproduction of the ostrich; and, this time, 
under conditions which speak decisively for the acclimation of this 
beautiful and useful bird. A pair which gave me two young ostriches 
in 1859, has just produced six more ; and I think it a duty to indicate 
the phases of the incubation: since, with regard to novel facts, the 
least details are not without their interest. 
A severe accident, which occurred to the male bird during the 
month of March, made us apprehensive of his loss. The ostrich 
drove its head with such force through the narrow bars of the fence 
which surrounds the park, that it was unable to withdraw it without 
causing a large wound upon its neck. Immediate assistance was 
