470 Morphologie. — Algae. — Fungi, Bakteria u. Morphologie. 



Schmied, Heinrich, lieber Ungleichblättrigkeit (Hetero- 

 phyllicj in der Pflanzenwelt. (Jahresber. der Landes- 

 Oberrealschule zu Römerstadt für 1904/05. Römerstadt 1905. 

 p. 3-12.) 

 Allgemeine Orientirung und die Darstellung der morpho- 

 logisch und biologisch interessanteren Typen in systema- 

 tischer Reihenfolge. Die Ursachen für das Zustandekommen 

 der Heterophyllie im engeren Sinne (nicht Anisophyllie im Sinne 

 Wiesner's) werden hierbei stets angegeben, sofern sie nicht 

 in der specifischen Organisation der Pflanze gelegen und daher 

 sich jeder weiteren Erkenntniss entziehen. Wesentlich neues 

 bringt die Arbeit nicht. Matouschek (Reichenberg). 



Batters, E. A. L., New or criticalBritishMarine Algae.. 



(Journal of Botany. Vol. XLIV. January 1906. p. 1—3. 



tab. 475.) 



In this paper the author treats of eleven species, of which two 

 are new to science and at least three of them are representatives 

 oi genera that have never before been found in Britain. One of the 

 novelties is Diplocolon codii which is epiphj^tic between the cortical 

 cells of Codinm tomentosum. It resembles Microcolens thonoplastes, 

 but is distinguished irom that species by the numerous heterocysts, 

 the pseudo-branching of the trichomes and the curious manner in which 

 they are coiled and twisted within the sheaths. The other novelty is 

 Mesogloia neglecta, which in general appearance and structure greatly 

 resembles M. Griffithsiana. It is however distinguished by the very 

 much shorter cortical filaments and the proportionally large spores. In 

 M. Griffithsiana the cortical iilaments gradually taper from the apex 

 downwards, and all the cells are coloured; while m M.neglecta the three 

 or four Upper cells are large, svvoUen and deeply coloured, whilst the 

 basal cells are very slender and colourless. Again, in M. Griffithsiana: 

 the spores are only about '/s the height of the cortical iilaments, while 

 in M. neglecta they are very nearly as high as the surrounding fila- 

 ments. These differences are well seen in the figures. 



E. S. Gepp-Barton. 



West, W. and Q. S., A Monograph of the British Desnü- 

 dlaceae. Vol. 11. (1905. X, 204 pp. 32 pls. Printed for 

 the Ray Society, London.) 



The first volume of this monograph has been already noticed in 

 this Journal, and the plan of the whole work was there described. In 

 the present volume the Cosniarieae are continued and the genera 

 Eiiastrnm, Micrasterias, and Cosmariiun are fully treated. The novelties 

 described for the first time are: Eiiastrnm crassnin Kütz. var. Taturnii. 

 E. oblongnm Ralfs var. depauperatiim, E. pidchellnm Breb. var. retusnni, 

 E. Corniibiense, E. siiblobatuin Breb. var. subdissimile, Cosmarium de- 

 pressiim Lund var. reniforme, and C. subqnadrans. 



E. S. Gepp-Barton. 



Dhere, Ch., Sur l'absorption des rayons ultra-violets 



p a r ! ' a c i d c n u c 1 e i q u e e x t r a i t de 1 a 1 e v u r e de 



biere. (C. R. Soc. Biol. Paris. T. LX. 6 janv. 1906., 



p. 34.) 



L'acide nucleique extrait par Grub 1er de la levure de biere en 

 Solution ä 1 : 10000 dans l'eau distilllee absorbe sous l'epaisseur de 



