542 SUftlMAKY OF UU It RE NT RESEARCHES RELATING TO 



Two New Volvocales.* — A. Pascher begins a series of articles on 

 the (Termau " Mikroflora," or an account dealing principally with the 

 fresh-water algse and Flagellate. In the first article he describes two 

 new Chlaiuydomonadiuete, Agloe biciliata, a new genus and species, 

 and Scherjfelia, a new genus founded on Carteria duMa and a new species 

 {S. phacus). The remai'kaljle feature about Agloe is the chromatophore, 

 which is described and figured ; and the genus is nearly allied to Chlamy- 

 domonas. In Scherjfelia also the chromatophores are remarkable, and 

 the genus is nearly related to Carteria. The author gives a short syn- 

 optical account of the Volvocales, adding a table to show the relationship 

 of the genera. 



Zoospores of Vaucheria aversa.f— V. Birckner describes the forma- 

 tion of zoospores in Vaucheria aversa. The material was gathered in a 

 small ditch near Leipzig, and was cultivated in a laboratory. Here it 

 speedily produced zoospores in the usual manner. These swarmed for 

 45-50 minutes, then came to rest and soon germinated. The sporelings 

 at once produced zoospores. Three or four weeks later reproductive 

 organs were found on the filaments. The author adds a few notes on 

 history and literature. 



Gronium and its Colony. J — R. A. Harper publishes an account of 

 the structure of the colony in Gonium. The most important characteristics 

 of the colony as a whole are to be found in the space-relations between 

 the cells ; these spaces are fairly constant. There is no tendency to 

 regenerate destroyed members of the colony. He describes carefully 

 the reproduction of the plant, and shows how the 16 -celled colony is 

 produced. Each individual cell is capable of reproducing a whole colony. 



Trichodiscus elegans. § — E. J. Welsford gives a morphological 

 account of Trichodiscus elegans, a new genus and species found in a 

 cultivation of Azolla Carolina, imported probably from Salem in North 

 Carolina. It forms small circular green patches about 1 mm. in diameter. 

 Its microscopical structure and its reproduction are described and figured. 

 It belongs to the Ch£etophoracea3. Both sexual and asexual cells were 

 found to be developed from similar initials under the same environmental 

 conditions. 



British Algae. |1 — J. Burton publishes notes on some freshwater algae 

 collected in 1911. He describes an Anabasna from Totteridge, probably 

 A. spiralis ; the " breaking of the meres " at Brent reservoir ; a Micro- 

 cystis from the Clifton zoological gardens. 



Algae of Stanklin Pool.lf — B. M. Griffiths gives an account of the 

 distril)ution and periodicity of the microscopic algae of Stanklin Pool, 



* Hedwigia, lii. (1912) pp. 274-87 (figs.). 



t Flora, iv. (1912) pp. 167-71 (figs.). 



% Trans. Amer. Micr. Soc, xxxi. (1912) pp. 65-83 (1 pi.). 



§ Ann. of Bot., xxvi. (1912) pp. 239-42 (1 pL). 



II Journ. Quekett Micr. Club, xi. (1912) pp. 435-40. 



t Proc. Birm. Nat. Hist, and Phil. Soc, xii. No. 5 (1912) 23 pp. (figs.). 



