Algae. 145 



cortex soon gives rise to secondary cortical filaments similar 

 to those from which they originated and each of the original 

 cortical filaments by repeated branching develops a complicated 

 System of threads. Later the inner cortex gives rise to simple 

 filaments of a much smaller diameter which ultimately form the 

 small filaments of the medulla. 



The vegetative cells except those of the large medullary 

 filaments contain a simple centrally placed nucleus, surrounded 

 by an irregularly ringshaped chromatophore. Floridean starch 

 is usually present in the vicinity of the chromatophore. 



The antheridia and procarps are often localized, but usually 

 they are borne together, even upon adjacent groups of cortical 

 filaments. Antheridia arise by the proliferation of the distal 

 cells of a peripheral filament, which are smaller than similar 

 cells of sterile filaments and devoid of floridean starch. Pro- 

 carps also arise from terminal cells of cortical filaments and in 

 all immature procarps the protoplasm of the trichogyne was 

 continuous with that of the carpogonial cells. An auxiliary stalk cell 

 is specialized immediately proximal to the carpogonial cell which, as 

 the trichogyne approaches maturity, becomes wider and more dense 

 than the adjoining cells. As the result of fecundation the carpogonial 

 cell divides transversely into two cells, one of which remains 

 sterile forming a stalk cell. The distal cell divides transversely 

 and later one or more divisions take place perpendicularly to 

 the first division forming a spherical mass of cells which 

 constitute the central cells of the cystocarp. From these the 

 gonioblastic filaments arise upon the end of which is formed 

 the spore which escapes ieaving the empty cell wall still 

 attached. Sterile filaments arise from the cells adjacent to the 

 auxiliary cells and form an imperfect covering about the base 

 of the cystocarp. 



Trichogloea lubrica is considered to most ciosely resemble 

 Liagora in vegetative structure and to be nearest to Nemalion 

 in its reproduction ; in other respects it holds an intermediate 

 Position between Nemalion and the three genera Liagora, 

 Helminthocladia and Helminthora. Moore. 



GlTWiNSKl, R., De algis, praecipue diatomaceis a Dr. 

 J. Holderer anno 1898 in Asia centrali atque in 

 China collectis. (Extrait du Bull, de l'Acad. d. Sciences 

 de Cracovie. Classe d. sc. math. et natur. Avril 1903. 

 p. 201—227. Tabula duplex IX.) 



Eine lateinisch verfasste Ergänzung der von W. Schmidle 

 in Bd. XXXIX der Hedwigia publicirten Abhandlung, enthält: 

 16 Species aus der Chloropliyceen-Cl^sso:, 150 aus der Diato- 

 maceen-, 6 aus der Cyanophyceen- und 2 aus der Flagellaten- 

 Klasse, zusammen 174 Algen Species. 



Als neu werden beschrieben und abgebildet: Vaiicheria 

 De-Baryana Wor. var. Schmidlei, eine Varietät, welche, zwischen 



Botan. Centralbl. Bd. XCHI. 1902. 10 



