870 REPORT OF DEPARTMENT or BOTANY, BRITISH MUSEUM, 1890. 
His greatest and final work on the subject is the Mechanisch- 
ets can Theorie der Abstammungslehre, 1884, in which the views 
above sketched received their full development, and in which is 
brought eme for the first time that theory of the idioplasm 
which forms the basis of so much recent work on heredity. 
n addition to the lines of investigation already referred to, 
Nageli made oem bee contributions to our knowledge of the lower 
Fungi,* and of the process of fermentation. He is also the author 
of various papers on pas or philosophical subjects quite distinct 
i Botany. It would be inappropriate to cite these here, but. 
a hey Sov an interesting indication of the many-sided character of 
is int 
uring the last half-century the ta nano of Botany has advanced 
as it never advanced before, and to this progress no one man has 
contributed more than Carl von Nigel. We trust that his work 
may be worthily continued in the hands of his distinguished 
successor in the Munich post, Dr. Karl Goebel. 
D. H. Scorr. 
REPORT OF DEPARTMENT OF BOTANY, BRITISH MUSEUM, 1890. 
By Wituiam Carrvruers, F.R.§S. 
Durine the year, 42,646 epocl Dene have been mounted, named, 
and inserted in their places in the Herbarium. These have con- 
sisted principally of plants from Greece, collected by ER a 
e Caucasus, by Brotherus; from Syria, by Post; from 
g; from China, by Hance; from Japan, by Maximowicz ; from 
Natal, by Clarke; from Madagascar, by gw Elliot: from Canada, 
by Ma acoun ; from Mexico, by Pringle; from British Gui ana, by 
Jenman; from South America, by Miers and Pearce; from aeeg ft 
nando de  wabsaies by Ridley; and from the Sandwich Islands, by 
Hillebrand 
In the progress of incorporating these additions, the following 
Natural Orders ers hay e been more or less completely re-arranged :— 
Malvacee, Leguminosae, Valerianacee, Aristolochiacee, Dipsaceé 
— gp peonence Chenopodiaceae, Juncacee, Cyperacea, and 
A soniior ws poke of the Fungi has been arranged and 
named according to Saceardo’s Sylloge Fungorum, and numerous 
specimens of Alge, Seer and Lichens have been incorporated 
with the Herbar 
aba revision of f the specimens and eae phone, oe the Natural 
— f Plants in the Public era has bee inued, and a 
icpidbacen series of the British Mosses, ay i — drawings of 
a Beker. has been added to the ‘exhibited collection of British 
* Die niedcren Pilze, 1877. Theorie der Jéihrung, 1872, 
