;")00 SUMMARY OF CURRENT RESEARCHES RELATING TO 



ili'-mselves described certain new genera belonging to Dasycladese and 

 Bornetellese. To the Acetabnlarieae belong Acini I aria, with sub-genera 



Briardina and Clypeina. Thereto are joined two groups of somewhat 

 uncertain position with unknown sporangia. Each species of all the 

 genera is fully described and figured. 



Bohemian Alga?.* — G. Prat publishes a second addendum to 

 the algal flora of Bohemia, thus bringing up to date the work of 

 Hansgirg. Numerous fresh localities are given for previously recorded 

 species, and one species, Goconnyxa dispar Schmidle, is recorded for the 

 first time for Bohemia. 



Swedish Marine Algae.f — H. Kylin writes on the marine algae in 

 the neighbourhood of Kristineberg, in Bohusliin. Two species, Ery- 

 throcladia suMntegra and Chantransia reducta, are here recorded for the 

 first time from the west coast of Sweden. 



Cell-contents and Membrane of Characeae.:}:— A. Votava confirms 

 and completes the investigations of Overton on the structure of 

 Characese. He found the typical " Stackelkugeln " (prickly balls) in 

 Nitella flexilis, N. opaca, N. capitata, and X. syncarpa ; while in X. 

 mucronata, N. hyaiina, N. gracilis, and N. tenuissima, he found the 

 non-cibated lumpy (" klumpige ") structures. Both show the same 

 reaction to albumen and tannin. Under certain conditions there may 

 appear in all Charas and Nitella? numerous centripetal thickenings of the 

 membrane. In the case of chamber-culture this is in most cases to be 

 attributed to impure air. The thickenings may also be caused by an 

 increase of sodium chloride in the water. In numerous rhizoid cells of 

 Characese are found large starch-grains of elongated form, sometimes 

 resembling a leg-bone, arranged in spiral rows. Various anatomical 

 details are figured. 



Fungi. 

 (By A. Loebain Smith, F.L.S.) 



Rhizopus Species. § — J. Hanzawa has studied by culture methods a 

 number of Rhizopus moulds, and has arranged them in a systematic 

 series according to their power of fermentation, their growth at low 

 temperature, etc. Rhizopus nigricans does not grow at 37° C. The 

 other species recorded do grow at that temperature ; but while some of 

 them form sporangia and spores, others belonging to a thermophile 

 group do not form sporangia at low temperatures. Several new species 

 are included in this .survey. 



After giving in tables the results of his cultures, he discusses the 

 value of his results from a systematic point of view. He compares this 



* Priroda, 1914, p. 303. See also Bot. Centralbl., cxxviii. (1915) p. 325. 

 t Arkiv Bot., xii. No. 10 (1913) 7 pp. 



X Oesterr. Bot. Zeitschr., lxiv. (1914) pp. 442-55 (figs.). See also Bot. Centralbl., 

 cxxviii. (1915) p. 412. 



§ Mycol. Centralbl., v. (1914) pp. 225-46 (12 figs.). 



