56 
quarries round Prague. He not only assisted tlieni with money, 
but supplied them with instruments to facilitate them labour. 
Anterior to 1840 the number of species scientifically indicated 
from the Silurian rocks of Bohemia was only 22, but by M. 
Barrande’s vast energy these were soon increased to more than 
1,200; at that j)eriod only two species of Brachiopods were 
known in Bohemia, but he nov/ transmits to his successors 
above 600 named Silurian species. These valuable researches, 
so perseveringly and uninterruptedly carried on to the present 
time, are recorded in his great and magnificent work, “ The 
Silurian System of Central Bohemia.” His v/ork on the 
Cephalopoda was commenced in 1865, and, now completed, extends 
to 544 large 4to plates and to about 3,600 4to pages of letter- 
press. In the smaller work on the table, the author has given 
a general resume of his studies on the Cephalopoda, with addi¬ 
tional notes, and has announced other works as now in progress. 
One on the Palaeozoic Grasteropods will consist of more than 
120 plates, and another on the Brachiopoda of 114 plates. In 
his two brochures, The Defence of Colonies ” already alluded 
to, and “ The Cephalopoda ”—for these must be studied in 
conjunction—-he treats at some length the subject which at the 
present time is of such absorbing interest to palaeontologists 
and naturalists generally, the attractive and fascinating theory 
of evolution by descent, of Darwin, of which he is a decided 
opponent, and boldly affirms that the theory of evolution of the 
cephalopods, like that of the trilobites, appears to be a mere 
product of the imagination, without any foundation in fact. 
In the brochure on the cephalopods, containing a resume of the 
whole subject, is a masterly and exhaustive summary in support 
of the author’s views. The notes are too long either for quota¬ 
tion or satisfactory analysis, the whole requiring the most 
attentive study. At page 248 he refers, evidently with great 
pleasure and satisfaction, to the opinions of three eminent 
savants^ who have arrived at conclusions in distant and inde¬ 
pendent paths very near to or identical with those which the 
study of the cephalopods has led him to adopt. One of these 
savants, Mr. Thomas Davidson, he styles “ our illustrious master 
and friend;” the second is, M. Grrand Eury; and the third. 
