422 THE POPULAR SCIENCE MONTHLY 
plishing’a remarkable amount of work in science, for he devoted his 
summers to study upon the seashore at a time when the waters of many 
a now polluted harbor were pure, so that he discovered many new and 
remarkable marine animals in the neighborhood of Boston, where now 
nearly all aquatic life has disappeared. He produced eighteen publica- 
tions during this period, the most notable being his illustrated catalogue 
of the “ North American Acalephe,” containing descriptions of many 
new and interesting forms of meduse from the Pacific and Atlantic 
coasts, and illustrated by 360 figures drawn from life by his own hand. 
It is but a just tribute to his thoroughness as a collector and observer 
to say that some of these meduse have never again been seen since he 
discovered them off the New England coast fifty years ago. 
Another interesting paper of this period is his “ Embryology of the 
Starfish” of 66 pages illustrated by 8 plates containing 113 figures 
beautifully drawn from life by the author; and yet another paper is 
upon the young stages of annelid worms in which he shows that in past 
ages adult worms were often provided with very large bristles, and that 
the young of existing marine worms still have such structures. 
At this time also he wrote much upon echinoderms, and made sub- 
stantial progress upon that great work of his early manhood, the 
“ Revision of the Echini,” which finally appeared in four parts between 
1872-74 and consists of 762 quarto pages of text and 94 plates; com- 
posed of drawings and photographs made by the author. This work 
caused his father keen delight, for he foresaw that it portended a dis- 
tinguished career in science to his gifted son. It won the Walker prize 
of $1,000 from the Boston Society of Natural History, and brought to 
its young author an international reputation. 
In 1866 he was elected to membership in the National Academy of 
Sciences, which at that time recruited itself from the active young 
workers of the country. He was president of the academy from 1901 
to 190%, and its foreign secretary from 1891 to 1901 and from 1908 
until his death in 1910. He bequeathed $50,000 to the academy. He 
was also deeply interested in the American Academy of Arts and 
Sciences and served as its president, gave large sums to it and left 
it $50,000 after his death. These two academies were the only scien- 
tific associations of America in which he took any active interest. 
Between 1860 and 1866 he laid the foundation for all that he was 
to achieve in science, with the exception of his elaborate explorations 
of coral reefs, and, with this exception, all of the subjects which were 
to engross his attention in future years were then engaging his active 
snterest. He never departed from the thought and method of these 
early days, and he always spoke of them with loving remembrance as 
“the good old days »__their influence upon his scientific career was 
paramount. For example, he never adopted the methods of the his- 
