254 TRANSACTIONS OF THE [JUNE 4, 
reef to Harper’s Magazine, which, running through six months, 
described his life in the great prison and the flora and the fauna 
of the reef. He contributed special articles to the various 
scientific publications of the day, reviewed and prepared scientific 
works for the press, and for many years contributed articles to 
the New York Zvening Post on the Museum of Natural History 
in this city. He was particularly interested in the study of the 
cetacea or whales, and one of the Bulletins of the Amer. Mus. Nat. 
Hist., N. Y., is devoted to his discussion of the Atlantic Right 
Whales; while many semi-scientific papers were published on 
this subject in the papers of the day. He was also interested in 
archxology, and contributed to the Century Magazine a valuable 
illustrated paper on ‘The Stone Collars of Porto Rico, ete.,” 
and many papers on allied subjects to other periodicals. At the 
time of his death, he was preparing an elaborate work on an 
archxological subject. 
Dr. Holder was joint author with the Rev. J. G. Wood of one 
of the finest popular works on natural history ever published, en- 
titled, ‘‘ The Living World.” It comprised an entire review of the 
animal kingdom. Dr. Holder provided the matter relating to 
the American fauna, and edited the work. He also added the 
account of the American fauna to Sir John Richardson’s work, 
**The Museum of Natural History,” this portion of which was 
later published separately as the ‘‘ American Fauna.” He was 
also joint author with his son of ‘‘ Elements of Zoology,” a text- 
book in the Appleton Science Series. 
Dr. Holder occasionally lectured on natural history, and was 
instrumental in forming various societies of natural history. He 
was ever ready to assist young naturalists, and stimulate in them 
a love for nature and reverence for the Power that governs it. 
In 1868, Dr. Holder was ordered to Fort Monroe, Va. In 1870 
he resigned to join Prof. A. S. Bickmore in the establishment 
of the Museum of Natural History, Central Park, New York, 
and for years that gentleman and himself carried on this great 
work, and cared for the collections almost unassisted—a labor 
that few not acquainted with the subject can appreciate. Dr. 
Holder was at first assistant superintendent, and during the 
past few years curator, of the Department of Invertebrate 
