ci. OBITUARY x 
ed 
other matters. In 1844, he published his observa- 
tions on the volcanic islands visited during the 
voyage of the “ Beagle.” In 1845, a largely re- 
modelled edition of his “ Journal” made its appear-— 
ance, and immediately won, as it has ever since 
held, the favour of both the scientific and the un- 
scientific public. In 1846, the “ Geological Ob- 
servations in South America” came out, and this” 
book was no sooner finished than Darwin set to” 
work upon the Cirripedes. He was led to under- 
take this long and heavy task, partly by his desire 
to make out the relations of a very anomalous 
form which he had discovered on the coast a 
Chili; and partly by a sense of “ presumption in- 
dacumninkiiny facts and speculating on the subje 
of variation ~withotit having worked out my “a 
share of species.” (II. p. 31.) The eight or nine 
years of labour, which resulted in a monograph of 
first-rate importance in systematic zoology (to say 
nothing of such novel points as the discovery of 
complemental males), left Darwin no room to = 
proach himself on this score, and few will share 
his “doubt whether the work was worth the con= 
sumption of so much time.” (I. p. 82.) . 
In science no man can safely speculate about 
the nature and relation of things with which he is | 
unacquainted at first hand, and the acquireme 
of an intimate and practical knowledge of t 
process of species-making and of all the uncertai 
ties which underlie the boundaries between speci 
