216 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
AlgBB. 
Reinke’s Atlas of German Seaweeds.^— In the first part of this 
magnificent work thirty species or varieties are described and figured, 
including many new species and several new genera. The larger 
portion is devoted to the Phaeophyceae, which the author divides 
into four main families: — the Cutleriaceac, Tilopterideae, Laminariaceae, 
and Ectocarpaceae, the last being divided into a number of smaller 
groups. 
Halothrix is a new genus, separated from Ectocarpus, coming near to 
Giraudia, but monosiphonous, and with plurilocular sporanges arranged 
in sori on the upper portion of the filaments. Symphoricoccus is distin- 
guished from Myriotrichia by its monosiphonous filaments, and from 
Elacliistea by the unilocular sporanges occurring on the upper as well 
as the lower part of the filaments. Kjellmannia is a new genus of 
Punetarieae, with a polysiphonous thallus bearing monosiphonous 
branches, and with two kinds of S})orange, both plurilocular, one inter- 
calary, the other collected into sori. Microspongium is a new genus of 
^ Myrionemem, resembling Myrionema in appearance, but with straight 
branched filaments, growing by apical growth, and with both unilocular 
and plurilocular sporanges. Leptonema is a new genus of Elachisteae, 
with both kinds of sporange ; the assimilating filaments, which branch 
only at the base, spring from a creeping protoneme. 
One new genus is described of marine Confervaceae, Epicladia^ nearly 
allied to Entocladia, resembling it in habit, and propagated by zoospores. 
BlastopJiysa is a genus of Sij)honeae, allied to Valonia, but resembling 
BoBydium in appearance ; it is composed of green vesicles, which were 
not seen to produce zoospores. Pringsheimia is a new genus, possibly 
belonging to the Ulvaceae, resembling Coleoclisete in appearance, but 
without bristles, epiphytic on various Algae ; it produces both megazoo- 
spores and conjugating microzoospores or zoogametes ; it may possibly 
be identical with Chsetopeltis Moeb. 
New Algae from Brazil.f — From a large collection of Algae sent 
from Brazil by Dr. H. Schenck, Dr. M. Moebius describes the following 
new genera; — 
Spirocoleus. Genus Oscillariacearum trichomatibus articulatis spi- 
ralibus simplicibus, vagina conspicua praeditis. One species, S. Lager- 
lieimii, growing among a Gliara. 
Entopliysa. Genus Chlorosphaeracearum. Thallus in algis majoribus 
sub cuticula vigens, e cellula subrotunda una vel e pluribus cellulis 
divisione unius cellulae exortis constitutus, membrana erassa, loco 
quodam in verrucam vel stipellum producta, chromatophoro unico 
parietino discoideo ; sporae divisione contentus cellulae succedanea evo- 
lutae per foramen membranae externae ac simul cuticulae hospitis exeunt. 
One species, E. Cliarse, living within the cell-wall of a Ohara, 
In addition to the above, the following new species are also de- 
scribed :-^Acetahularia Schenchii, Dictyopteris Hauckiam, Gracilaria 
Salzmanni. 
* ‘ Atlas Deutscher Meeresalgeu,’ Ites Heft, fob, Berlin, 1889, 34 pp. and 25 pis. 
t Hedwigia, xxviii. (1889) pp. 309-47 (2 pis. and 1 fig.). 
