3(52 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
epiphyticus, repens v. scandens, pluricellularis ; cellulae globosse v. 
hemisphsericae, seta vaginata (coleochaetoidea) longissima super praeditae, 
utriculis cylindraceis contentu vacuis interpositis in filamenta brevia 
subramosa conjunctae, nucleis chlorophoris pyrenoideisque singulis ; in- 
crementum ramificatioque filamentorum divisione cellularum horizontali 
fiunt, cellulis filiis inferioribus lateraliter in utriculum cylindraceum 
subinde vacuum excrescentibus, et in extrema parte ejus in cellulam 
globosam mox setigeram se mutantibus. Propagatio vegetativa zoosporis 
ex inferiori cellulae divisae parte singulatim ortis, per utriculos uncinate 
ascendentes dimissis fieri videtur (?) ; zoosporae earumque dimissio non 
visa? ; generatio sexualis ignota. 
The species described, Chsetosphseridium Pringsheimii, was found 
growing along with one or two species of Goleochsete , with which it has 
probably hitherto been confounded. The globular or hemispherical 
cells are somewhat smaller than those of most species of Coleochsete, and 
bear bristles of enormous length, sometimes as much as 200-300 p. 
From these setigerous cells a multicellular thallus is formed, which has 
the peculiarity of branching sympodially, and forming at the ends of 
its branches globular setigerous cells, into which the whole of the proto- 
plasm and chlorophyll passes, leaving the intermediate tubes empty. 
The genus is in some respects nearly allied to Coleochsete , but should 
possibly constitute a new family, connecting the Coleochaetaceae with 
the Chaetophoraceae. 
Prof. A. Hansgirg * identifies Klebahn’s Chsetosphseridium Prings- 
heimii with the plant formerly described by him as Aphanochsete globosa 
var. minor , and assigns to it, therefore, the name Chsetosphseridium 
minus. 
Naegeliella, a new Genus of Brown Freshwater Algae. | — Under 
the name Naegeliella Jlagellifera , Herr C. Correns describes a hitherto 
unknown brown alga, epiphytic on a freshwater Cladophora, and apparently 
allied to Hydrurus and Chromophyton. It forms gelatinous discs, which 
are colonies of a unicellular alga, resulting from divisions of the mega- 
spore ; the divisions are eventually in all three directions. The ultimate 
form of the cell is somewhat ovate, and each disc has one or more very 
fine gelatinous bristles of remarkable length, but difficult to detect with- 
out staining reagents ; they are simple or branched ; the cells are 11-16 p 
long and 9-14 p broad. Each has a nucleus and a conspicuous lobed or 
curved chromatophore without either pyrenoid or starch. Its colour is a 
pure deep golden brown ; the pigment is apparently identical with dia- 
tomin, but differs from pliycophaein in its solubility in alcohol, and in 
its behaviour to acids and alkalies. The cell contains also drops of oil, 
but no pulsating vacuole could be detected. Propagation is effected by 
swarmspores (megazoospores), without eye-spot, each provided with two 
cilia inserted laterally. They were not seen to conjugate, and no 
microzoospores were observed. The bristles are enclosed in a gelatinous 
sheath ; ultimately a number are formed within the same sheath. 
The author considers the nature of the pigment in Algae to be closely 
associated with other important differences in structure ; and proposes to 
* Oesterr. Bot. Zeitschr., xliii. (1898) pp. 56-7. 
+ Ber. Deutech. Bot Gcsell., x. (1892) pp. 629-36 (1 pi.). 
