450 SUMMARY OF CURRENT RESEARCHES RELATING TO 



AlgSB of Bohemia.* — A. Pascher publishes a further contribution to 

 his algal flora of the Southern Bohemian Forest, in which he not only 

 enumerates all the species found since October 1903, but he publishes 

 all the observations he has made during many years of study upon the 

 morphology and reproduction of different genera of algte ; for instance, 

 the swarming of confervge, the number of chromatophores in the swarm- 

 spores, characteristics for the limiting of species in Stigeoclonium, etc. 

 The paper enumerates 8 Heterocontai, 1<S6 Zygophyceie (Acontai), 129 

 Chlorophycege, 1 Rhodophycete, 3 Glaucophycese, 132 Schizophyceae. 



Loo-Choo Algae. t — F. Heydrich publishes a list of 53 marine alg^ 

 from the Loo-Choo or Liu-Kiu Islands, Japan, collected by Kuroiwa, 

 and preserved in the Berlin herbarium. Notes are added to records of 

 Petjssoiinelia catdifera Okam., and Mastophora macrocarpa jVIont. 



Antarctic Marine Algae. | — A. and E. S. Gepp publish their full 

 report witli illustrations upon the marine algfe collected within the 

 Antarctic circle by the staff of the ' Discovery ' during the recent 

 National Expedition (1901-4). The collection consisted of but twelve 

 species, three of which were new to science, and two of which were 

 briefly described in the "Journal of Botany" in 1905. Full details are 

 now given of all the critical species. The most remarkable plants dealt 

 with are two large species of Lessonia, confined to Antarctic waters, and 

 unknown to science previous to the recent South Polar expeditions. 



Ceramium pallens Zan.§ — G. B. de Toni has examined specimens of 

 this alga in Zanardini's herbarium, collected by Vidovich at Capocesto, 

 in Dalmatia. He finds that they are sufficiently near to G. harhatwn 

 Kiitz. as to represent one of the many forms of this polymorphous 

 species. An interesting point in the specimens was the fact that the 

 tetraspores are divided cruciately instead of triangularly. The author 

 remarks on the method of division found in the various genera of 

 Ceramiacete, and shows that, though in some of them the division is 

 exclusively either cruciate or triangular, in others this character is not at 

 all constant, even varying in the tetrasporangia of one and the same 

 plant. This is seen in Seirospora. In Ceramium, the typical division 

 is triangular, but in rare cases cruciate division is found. Among the 

 Ceramiacea? all forms are represented, from monosporangia to poly- 

 sporangia. 



Conjugatae from Orense.||— F. Bescansa gives a list of 25 Desmidi- 

 acese, lo Zygnemacefe, and 2 Mesocarpaces, gathered chiefly in the 

 environs of the capital, and from other parts of this province of Spain. 

 To each record are appended its measurement and the locality where it 

 was found. Galicia is rich in fresh-water algaj, due, in the author's 

 opinion, to the humidity of the country, and to its mountainous surface 

 which feeds a large number of rivers and streams. The most richly 

 represented group is that of Conjugate. 



* SB. Deutsch. Nat. Med. Ver. Bohmen, " Lotos," 1906, No. 6, pp. 1-3G. 



+ Ber. Deutsch. Bot. Gesell., xxv. (1907) pp. 100-8 (1 pi.). 



X National Antarctic Expedition (Nat. Hist.),iii. (1907) 15 pp. 4 pis. 



§ Mem. R. Accad. Sci. Lett. Art. Modena, ser. 3, viii. (1907) 9 pp. 



II Bol. R. Soc. Espan. Hist. Nat., vii. (1907) pp. 65-8. 



