&l4 ——. THE AMERICAN NATURALIST. [VoL. XXXV. 
other ferns come to rest upon the withdrawal of water from their 
contents is also considered. The swarm period of the spermato- 
zoids of the above-named fern has been determined to be two hours, 
— a much longer time than reported in previous cases, — during 
which period the starch stored up in it disappears. H. M. R. 
The Flora of Celebes. — The interest which American botanists are 
likely to feel in the flora of the Pacific Islands in consequence of our 
occupation of the Philippines makes Dr. Koorders' report! on Mina- 
hasa, the northeastern horn of Celebes, of more than passing impor- 
tance to us. In addition to physiographic and similar data this 
volume, which forms one of the regular series of Mededeelingen issued 
from the Botanical Garden at Buitenzorg, gives a critical review of 
what had previously been written on the flora of Celebes, an anno 
tated catalogue of the spermatophytes and pteridophytes known to 
occur in the island, descriptions of a number of new species, and 
full indices to the popular and scientific names of the plants, as 
well as chapters on the economic uses of many of the species and 
tabulations of plants yielding the more important useful products. 
Unfortunately the text is in Dutch, but diagnoses of new species are 
in Latin, and there are frequent annotations in German. 
Notes. — The announcement for the Fourteenth Season of the 
Department of Botany of the Marine Biological Laboratory at Woods 
Holl has just been issued. The work will commence on July 3 and 
continue for six weeks. Courses have been provided in Cryptogamic 
Botany by Dr. Davis and Dr. Moore; in Phanerogamic Botany by Dr. 
Charles H. Shaw, and in Plant Physiology by Dr. R. H. True. Plant 
Cytology will be under the direction of Dr. Davis and Mr. Lawson, 
and in addition to the regular class work provision will also be made 
for a series of special lectures. Announcements and further informa- 
tion may be obtained from Dr. Bradley M. Davis, University 9 
Chicago. 
The Bulletin de P Herbier Boissier, suspended for a time, appears 
again, under the direction of M. Gustave Beauverd, curator of the 
herbarium. The first number of the new series, bearing the pu 
December 29, contains papers on African plants by de Wildeman 
! Koorders, S. H. Verslag eener botanische denstreis door de Minahasa, re 
eerste overzicht der flora van N. O. Celebes, uit een wetenschappelijk en e 
oogpunt. Batavia, s'Gravenhage, 1898, xxvi + 716 pp., 10 charts and 3 plate 
Mededeelingen van s’ Lands Plantentuin, No. xix. 
