ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 679 



joint in Perenyi's fluid ; and, if the filaments are not then sufficiently 

 clear, the preparation may be treated with eau-de-Javelle and stained. 



Japanese Marine AlgEe.* — K. Okamura continues his illustrations 

 of the marine Algae of Japan. The author describes and figures the 

 cystocarps and tetraspores of Lomentaria catenata Harv., and shows 

 that it is a distinct species related to L. articulala Lyngb. A new 

 species, Phacelocarpus japonicus, is described. The cystocarps and 

 tetraspores are axillary and pedicellate, and the species is placed in the 

 sub-genus Euctenodus, near P. Labillardieri. Another new species, 

 Gutleria cylindrica, is interesting as showing a new type of structure 

 for the genus; the symmetry is radial, instead of bilateral. Cladophora 

 Wrightiana Harv. is described and figured ; and the last plate is of 

 Bhipidiphyllon reiiculatum (Ask.) Heydr. Comparisons are drawn 

 between Anadyomene, Microdictyon and Bhipidiphyllon, the differences 

 between the two latter genera being confined to differences in the shape 

 of the cells of the veins and veiulets, and in the habit. 



Marine Algse of the Mediterranean.! — In a note on the algse of 

 this region Francesco Ardissone gives a few critical remarks on the 

 genus Rodriguezella, the species B. Straff or ellii Schmitz, B. Bornetii 

 Schmitz, Gonstantinea grandifolia Ardiss., Sphserococcus rhizophylloides 

 Rodrig., Halymenia patens J. Ag., and H decipiens J. Ag. He also 

 describes a new species, Halymenia coccinea, but he has not seen the 

 fruit. A few remarks on nomenclature close the paper. 



The same author $ publishes the first part of a Supplement to his 

 Phycologia Mediterransea. He deals with the question of classification 

 according to the system of Agardh, or of Schmitz, and gives as his 

 opinion that the Schmitzian system is not a natural or a logical one, 

 and therefore he cannot follow it. He gives a synopsis of the orders, 

 and a list of genera and species recorded from the Mediterranean. Then 

 follow notes on Gallithamnion, treating of the genera into which it has 

 been divided by various authors, with a key to the species ; and notes 

 on Gonstantinea, Meredithia, Ghylocladia, and Lomentaria. The paper 

 closes with a list of figures of genera represented in the Mediterranean. 



Stichococcus bacillaris Naeg. § — L. Matruchot and M. Molliard 

 publish the conclusion of their studies on the variations of structure of 

 a green alga under the influence of a nutritive medium. They describe 

 their experiments on Stichococcus bacillaris, which they find does not 

 behave like an anaerobic organism, though it requires but little oxygen 

 for its development. Glucose acts as by far the most favourable 

 medium, and after that dextrin and gum, glycerin and mannite. Sac- 

 charose, lactose, maltose, peptone, inuline, and starch have but little 

 effect. These substances also affect variously the colour of the alga. 

 The action of certain mineral substances is also described. The various 

 changes obtained artificially help to explain the dimorphism found in 

 members of one and the same colony. The authors have distinguished 



* Illustr. Mar. A.lg. Japan, i. No. vi. (Tokyo 1902) pp. 475-93 (5 pis.). 



t Rendiconti Real. 1st. Lombard., xxsiv. (1901) pp. 122-7. 



% Tom. cit., pp. 1013-41. 



§ Revue Gen. Bot., xiv. (1902) pp. 316-32 (3 pis.). 



/ 



