on the philosophical and educational bearings of his work. On the one
hand are memoirs of Daphnia, Nautilus, and the Herring, the affinities
of the Paleozoic Crustacea, the Ascidian Catalogue and Positive
Histology; on the other, the Literature of the Drift, a review of the
present state of philosophical anatomy, and a scheme for arranging the
Explanatory Catalogue to serve as an introductory textbook to the Jermyn
Street lectures and the paleontological demonstrations. Here, too, would
fall a proposed "Letter on the Study of Comparative Anatomy," to do for
those subjects what Henslow had done in his "Letter" for Botany.

In addition to the fact of his being forced to take up Paleontology, it
was perhaps the philosophic breadth of view with which he regarded his
subject at any time, and the desire of getting to the bottom of each
subsidiary problem arising from it, that made him for many years seem
constantly to spring aside from his own subject, to fly off at a tangent
from the line in which he was assured of unrivalled success did he but
devote to it his undivided powers. But he was prepared to endure the
charge of desultoriness with equanimity. In part, he was still studying
the whole field of biological science before he would claim to be a
master in one department; in part, he could not yet tell to what post he
might succeed when he left--as he fully expected to leave--the
Professorship at Jermyn Street.

One characteristic of his early papers should not pass unnoticed. This
was his familiarity with the best that had been written on his subjects
abroad as well as in England. Thoroughness in this respect was rendered
easier by the fact that he read French and German with almost as much
facility as his mother tongue. "It is true, of course, that scientific
men read French and German before the time of Huxley; but the deliberate
consultation of all the authorities available has been maintained in