340 BIOGRAPHICAL SKETCHES. 
lantic States, continuing the exploration of our Algaw down 
to Florida and the Keys; and in May, 1850, he returned to 
Ireland. Under the wise and liberal arrangements made by 
Professor Henry in behalf of the Smithsonian Institution, 
and with his own large collections augmented by the contribu- 
tions which every student or lover of Algw@ was glad to place 
in such worthy hands, Professor Harvey now prepared his 
“Nereis Boreali-Americana, or Contributions to a History of 
the Marine Algz of.North America.” The work is a sys- 
tematic account of all the known Marine Algw of North 
America, but with figures only of the leading species. It was 
issued in three parts: the first part, the /elanospermee, in 
1852, in the third volume of the Smithsonian Contributions to 
Knowledge; the second, Rhodospermee, in the fifth volume ; 
and the third, or Chlorospermea, in the tenth volume of the 
series, published in 1858; and the three parts, collected for 
separate issue, compose a thick imperial quarto volume, of 
five hundred and fifty pages of letter-press and fifty plates. 
The work remains the principal if not the only guide to the 
American student of Alga, and one of the most popular as 
well as useful of the various contributions to knowledge 
which the well-managed bequest of Smithson has given to 
the world. 
Before the last part of the “Nereis Boreali-Americana” 
was published, Professor Harvey had sought a wider field of 
scientific labor and observation. Obtaining a long leave of 
absence, and some assistance from the University in addition 
to the continuance of his salary, he left England in August, 
1853, by the overland route for Australia, stopping at Aden 
and Ceylon to collect: he visited the east, south, and west 
coasts of Australia, as well as Tasmania. Taking advantage 
of a missionary ship, which was to cruise among the South Sea 
Islands, and which offered him unexpected facilities, he vis- 
ited the Fiji, Navigators’, and Friendly Islands, touching also 
at New Zealand. Returning to Sydney, he sailed to Valpa- 
raiso, which he reached much prostrated through over-exer- 
tion in a warm climate; and when recuperated he re- 
turned home by way of the Isthmus, arriving in October, 
