228 
chronological sequence, genetic relations 
and physiological consequences. So numer- 
ous were his memoirs, so entirely did he 
cover the field of herpetology, and so 
marked an impression did he make on the 
science, that he was well entitled to apply 
to himself the boast of the Vergilian hero, 
© Pars magna fui.’ 
In his earliest essays he manifested the 
independence and critical spirit which were 
so characteristic of him later. One know- 
ing all the circumstances of the case may 
be amused in coming across a passage ex- 
pressed in the tones of a veteran published 
by him when 20 years old: ‘‘In proposing 
the name Zaocys * * * we are giving ex- 
pression to an opinion long held by us as to 
the unnatural association of species in the 
so-called genus Coryphodon * * *, In it 
we find cylindrical terrestrial species united 
with compressed subarboricole species, upon 
a peculiarity whose value as an index of 
nature appears to us entirely imaginary. 
The very nature of the coryphodontian type 
of dentition, as distinguished from the iso- 
dontian and syncranterian, would lead us to 
infer its inconstancy;” andsoon.* Boldas 
was the criticism of such herpetologists as 
Duméril, Bibron and Gunther, it was justi- 
fied by the facts, and the young author’s 
conclusions have received the endorsement 
of the best succeeding herpetologists, in- 
cluding even the latest author criticised. 
In 1863 he paid a visit to Kurope, partly 
for the benefit of his health which had suf- 
fered from overwork, and partly for the 
purpose of seeing the great museums of 
England, France, Holland, Austria and 
Prussia. Notwithstanding his ailments, he 
made good use of his time abroad and sys- 
tematically examined the collections of rep- 
tiles in the chief centers of science. He 
did not even restrict his studies to herpe- 
tology, but extended them to various other 
subjects. 
*Proc. Acad. Nat. Sci., Phila., 1860, p. 563. 
SCIENCE. 
[N. S. Vou. VI. No. 137. 
On his return from Europe, in 1864, he 
was appointed professor of natural science 
in Haverford College, an institution chiefly 
supported by Quakers, but retained the po- 
sition only three years. During this time, 
in 1865, he married Miss Annie, daughter of 
Mr. Andrew Pim, of Chester county, Pa. 
In and after 1864, too, he enlarged the 
range of his studies and publications and 
also extended them to ichthyology, mam- 
malogy and paleontology. He had always 
been interested in the philosophical aspects 
of science and early adopted the conception 
of descent with modifications to account 
for the variations of animals and the differ- 
entiation into species and higher groups, 
and in 1869 began to give expression to his 
peculiar views. 
On the death of his father he became 
heir to a considerable fortune. Part of this 
was invested in mines which for a short 
time gave promise of good returns, but, it is 
said, the majority of the stock was held by 
others, and owing to the incapacity of super- 
intendents and the operations of the con- 
trolling stockholders he lost his interests. 
While in the enjoyment of his fortune he 
spent large amounts in collections and per- 
sonally conducted or sent out expeditions 
to various places. One of the most impor- 
tant was sent to South America. He filleda 
large house from cellar to topmost story 
with his collections and resided in an ad- 
joining one. 
In 1871 he conducted an expedition to 
Kansas and especially investigated the Cre- 
taceous beds of that State and collected 
their fossils. In 1872 and 1873 he became 
connected with the U. 8. Geological Survey 
and for the fossils visited Wyoming in the 
former year and Colorado in the latter. In 
1874 he joined the survey under the com- 
mand of Lieut. Wheeler, of the Engineers, 
and explored New Mexico. 
The collections made during these expe- 
ditions were large and the unwearied in- 
