55 
“ I beg of you to express to it my sincere gratitude for this 
mark of kind and friendly sympathy. 
‘‘ Accept, sir, the expression of my very high esteem. 
“J. BAERANDE. 
“ I send you by the same post four brochures or pamphlets 
as a present to the Philosophical Society of Yorkshire :— 
“ 1870. Defence of Colonies, with Map and Sections. 
1872. The different forms of Crustacea and fishes. 
“ 1877. Cephalopoda. 
“ 1879. Brachiopoda.” 
Mr. Noble added that in the first work in the list one of the 
most interesting points to which M. Barrande had drawn 
attention was the occurrence of what he termed Colonies, be., 
groups of fossils having special characters which occur in beds 
intercalated in strata, having a different fauna, but subsequently 
recurring in higher beds as the predominant fauna. M. 
Barrande regarded them as migratory and temporary offshoots 
from some co-existent but distant fauna, which, subsequently, 
however, came into the same area in force, displacing the older 
fauna altogether. Those researches, and the conclusion deduced 
from them, were of the highest practical importance to the 
geologist and palseontologist, and were deserving of the most 
careful study. He (Mr. Noble) had thought it might not be 
uninteresting on the occasion of the last meeting of the session 
before the vacation to refer to the valuable works of M. 
Barrande on “ The Defence of Colonies ” and “ The Cepha¬ 
lopoda,” and he had drawn up a few notes on the subject, 
which he v/ould now read. Mr. Noble then proceeded: — 
This distinguished and indefatigable investigator and laborious 
worker in the field of geology and palaeontology amongst the 
Silurian rocks of Bohemia, M. Joachim Barrande, has most 
deservedly gained for himself in this branch of science a world¬ 
wide reputation. His researches extend over the complete 
fauna of an entire geological formation. M. Barrande is a 
native of France, and commenced his researches in 1833 under 
great difficulties, having to make himself acquainted with the 
language of his partly-adopted country in order to facilitate 
his intercourse with the Bohemian workmen engaged in the 
