342 BOTANICAL GAZETTE [APRIL 
Symbiosis between algae and sponges.—T wo new species of red algae have 
been described by Madame WEBER VAN BosseE* as belonging to the genus 
Thamnoclonium and living in symbiosis with a sponge which forms a continuous 
layer over the flattened and branching thallus of the plants. In the sponge 
are found imbedded small branches of the algae and also a series of filaments 
that are apparently epidermal outgrowths of the plant, but whose nature and 
origin could not be definitely determined on account of the scantiness of the 
material which was collected on some East Indian islands. The character of 
the — between the two symbionts remains to be determin 
G. D. Fut 
Flora of New Guinea.—A volume of the botanical results of the Dutch 
scientific exploration of New Guinea during 1912 and 1913 has appeared.’5 
Previous parts of the botanical report on New Guinea were reviewed in this 
journal.* The present part includes the Orchidaceae by J. J. Smrra. The 
species number 151, included in 41 genera, of the species being desc ribed as 
new. By far the largest genus is Dendrobium, with 52 species, Bulbophyllum 
being next with 24 species. The present cane ose brings together pier 
publications of Smiru, who is credited with 130 of the gaan = 3 of 
genera. In Dendrobium, Smiru has described 47 of the 52 sp 
Another volume of the botanical results of the Dutch ie pa of 
New Guinea during 1907 and 1909 has also appeared.” The preceding part was 
published in 1912.% In the present part the collaborators are HANS LLIER 
and Tu. VALETON. Altogether 9 families are presented, all monocotyledons, 
including 25 genera and 113 species, 62 of which are new. Most of the con- 
tribution consists of the presentation of Zingiberaceae by VALETON, I including 
ro genera and g2 species (56 new). The large genera are Alpinia, with 35 
species (22 new), and Riedelia, with 28 species (21 new).—J. M. C. 
A toxin from Rhizopus.—BLAKESLEE and GORTNER” ae announced the 
discovery of a toxin produced by Rhizopus nigricans. The xpressed juice 
from aerial filaments caused almost instant death when injected imeerenell 
into rabbits. Since this fungus has a very wide distribution, and is 
** WEBER VAN Bosse, Madame A., Sur deux nouveaux cas de oases enite 
algues et éponges. Ann. oe oom Buitenzorg. oe 33°: 581-98 1 
73 Nova Guinea. Résult Biase aeons 
Guinée en 1912 et 1913 sous les auspices de A. repro ghseemanti Vol 
Botanique. Livraison IV. 4to. pp. 1-108. pls. 1-28. Leide: E. J. Brill. 1913- 
Poke Gaz. 49: 464. La aio ss: set: 1913. 
ova Guinea. Ré tifi e Néerlandaise & la Nowell 
Guin Se en 1907 et 1909 sous ies auspices de Dr. H. A. Lorentz. Vol. VIII. 
nique. Livraison V. 4to. pp. 899-988. pls. 160-179. Leide: E. J. Brill. 1913- 
% Bor. Gaz. §5:462. 1913. oe 
* BLAKESLEE, A. F., and Gortner, Ross AIKEN, On the occurrence of a toxin 
uice from the bread mould, Rhizopus nigricans (Mucor stolonifer)- bint 
Bull, 2:542-544. 1913. 
