ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
341 
rhizoides, simplices v. ramosi, plerumque unicellulares, in mucum 
gelafcinosum algarum nonnullarum penetrantes, alii pluricellulares, 
erecti, in pulvinos minutos cumulati ; chlorophora parietalia. Propagatio 
zoogonidiis pyriformibus in cellulis ramorum terrainalibus ortis. 
Zachariasia (Chroococcace®). Cellul® oblong® v. elliptic®, v. e 
pressione mutua parum angulat®, distincte vaginat® ; quatern® in 
tegumento cominuni disposit® ; chlorophora stellata. 
Formation of Rhizoids by Chlorophyce®.* — M. 0. Borge states 
that the capacity of forming rhizoids is especially characteristic of those 
Chlorophyce® which live in running water, e. g. Cladophora , Brapar- 
naldia , TJlotlirix , Spirogyra fluviatilis. Their formation is induced by 
contact with a solid substance, but may also be promoted by growing 
in a concentrated nutrient solution. The rhizoid is always produced 
near the extremity of a filament, usually from the terminal cell. If the 
distance from the apex is considerable, it is always formed in contact 
with a dead cell. Vaucheria and (Edogonium form rhizoids only on 
young filaments ; V. sessilis appears never to produce them, and the 
same is the case with other filamentous Chlorophyce® which grow only 
in stagnant water. 
Membrane of Caulerpa.j — Herr C. Correns finds that, in all species 
of Caulerpa examined, moderately concentrated sulphuric acid causes 
the formation of granules in the cell-wall, and these granules yield the 
microchemical reactions of sph®rocrystals. They occur also in some 
species of Bryopsis , but not in other genera of Siphone®. The mem- 
brane itself does not consist of cellulose in the strict sense of the terra, 
nor is it identical with callose, fungi-cellulose, or reserve-cellulose. It 
exhibits a distinct striation. In some species of Caulerpa , but not in 
others, the author also describes a peculiar thickening of the membrane 
in the form of conical projections, which he regards as of the nature of 
rudimentary cystoliths. They have nothing to do with the “ beams.” 
Fungi. 
Classification of Fungi.J — M. L. Marchand proposes the classifica- 
tion of the Fungi (including Lichens), under two primary divi- 
sions, the Mycomycophytes and Mycophytophytes, the former com- 
prising the Fungi and a few families of Lichens, the latter the remaining 
Lichens. The Mycomycophytes are again divided into two groups, the 
Asporomycetes and the Sporomycetes, the former corresponding to the 
“ Fungi imperfecti.” The Sporomycetes are arranged under four heads, 
the Mycomycetes , Siphomycetes , Thecamycetes , and Basidiomycetes. The 
Siphomycetes (Phycomycetes) comprise the Endoconidiferse (Chytri- 
diace®, Mucorace®, Monoblepharide®, and Saprolegniace®), and the 
Ectoconidiferse (Peronosporace® and Entomophthorace®). The Theca- 
* ‘ Sur la formation de rhizoides chez quelques Chlorophycees filamenteuses,’ 
Upsala, 1894, 61 pp. and 2 pis. See Morot’s Journ. de Bot., viii. (1894) Bull. Bibl., 
p. lxv. 
t Ber. Deutsch. Bot. Gesell., xii. (1894) pp. 355-67 (1 pi. and 1 fig.). Cf. this 
Journal, 1894, p. 215. 
x Bull. Soc. Mycol. France, 1894. See Bot. Centralbl., lxi. (1895) p. 227. 
