ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 63 



illustrated, and references to literature are given at the end of each 

 section. 



Phycological Notes of the late Isaac Holden.* — F. S. Collins 

 has undertaken to edit the valuable notes of Holden, with whom and 

 Setchell he was associated in the issue of the "Phycotheca Boreali- 

 Americana." Holden was an indefatigable collector, and his notes will 

 be most interesting to all algologists. In the publication of them, the 

 record is not in chronological order, but by species ; the marine and 

 fresh-water forms from Connecticut localities being in separate lists. 

 Under each species (or variety) are given the numbers, the localities, 

 and the dates ; and where specimens of the number in question were dis- 

 tributed in the " Phycotheca Boreali- Americana," they are indicated by 

 the initials P.B.A., with the respective number. A list is also appended 

 of species collected by him in Newfoundland. 



Seaweeds.f — D. W. Bevan describes in very popular form the three 

 groups of marine algae, brown, red, and green. The commonest species 

 are described, and some of them are figured. (It may be worth remark- 

 ing that fig. 6 on p. 202 is wrongly named Laminaria digiiata. It 

 represents a plant of L. Gloustoni). The author gives useful hints to 

 would-be collectors as to the best way of drying and mounting speci- 

 mens, and he also describes the escape of zoospores in Cladophora 

 rupestris, and the best method of showing their heliotropic tendency. 



Effect of Bora on Marine Algse.J — C. Techet describes the extra- 

 ordinary effect of a strong north wind (the Bora) on the shores of Istria 

 and especially at Trieste in the early part of 1905. The algal vegetation 

 which was not adequately submerged was either injured or destroyed. 

 Dictyota dichotoma disappeared almost entirely, and many algae, Calli- 

 thamnion, Chylocladia, Gystosira abrotanifolia, Ulva, and Bryopsis were 

 partly destroyed. In their places there appeared after a short time a 

 number of Bacillarieae, such as had never been observed before, and 

 three months later they were still there. They consisted chiefly of 

 species of Navicula, a genus which lives well in low temperature. The 

 sea at the time was scarcely 40° F. near the surface. 



Method of Drying Algae speedilyj — J. Chalon describes a prac- 

 tical way of overcoming the difficulties of drying marine algae, when 

 travelling. He carries with him on his travels a plate of red copper, 

 curved, 1| mm. thick. The other dimensions are 30 and 35 cm. This 

 is placed on one of the common petroleum stoves found in all house- 

 holds abroad. On one side lies the heap of drying papers with algae in 

 process of being pressed, and each sheet is by turn placed on the hot 

 copper plate over the stove, the algae being meanwhile removed and 

 replaced when the sheet is dry. The dry sheets form by degrees a heap 

 on the other side of the stove, and in a short time all the algae are once 

 more being pressed between quite dry papers. This arrangement saves 



* Rhodora, vii. (1905) pp. 168-72, 222-43. 



t Knowledge and Sci. News, ii. (1905) pp. 202-3, 225-6, 248-9 (23 figs, in text). 



X Oesterr. bot. Zoitschr., lv. (1905) pp. 238-9. 



§ Bull. Soc. Roy. Bot. Belgique, xlii. (1904-5) p. 95. 



