May 6, 1910] 



SCIENCE 



711 



Oeorge T. Moore, of the Missouri Botanical 

 Gardens, St. Louis, Mo., is in charge of this 

 work. 



The Biological Laboratory at Cold Spring 

 Harbor, Long Island, announces courses from 

 July 6 to August 16, in Cryptogamic Botany, 

 and Ecology, as well as opportunities for in- 

 vestigation. Professor D. S. Johnson, of the 

 Johns Hopkins University, is in charge of the 

 botanical work. 



In the interior we have it announced that 

 the second session of the Lakeside Laboratory 

 at Lake Okoboji, Iowa, will extend from June 

 20 to August 15. Professor T. H. Maebride, 

 Iowa City, Iowa, will be in general charge of 

 the botanical work. Courses are offered in 

 Mycology, the Biology of Aquatic Plants, the 

 Nature of Plants, Histological Methods and 

 Ecology, with opportunities for research 

 work. 



In the Pocky Mountains there will be con- 

 tinued from the middle of June to the end of 

 July the University of Colorado Mountain 

 Laboratory at Tolland, Colo., at an altitude of 

 nearly nine thousand feet. Alpine problems 

 will be given especial emphasis. The botan- 

 ical work is in charge of Professor Francis 

 Eamaley, Boulder, Colo. 



PAPERS ON ALGAE 



A VERY helpful paper entitled " Hints on 

 Collecting and Growing Algae for Class Pur- 

 poses," by Professor J. A. Nieuwland, ap- 

 peared in the October (1909) Midland Nat- 

 uralist, in which the author gives with 

 considerable fulness his methods which he has 

 found to be successful. He encourages us by 

 saying that " as a matter of fact it is not es- 

 pecially difficult to obtain or even to grow the 

 lower plants, and most of them once gotten 

 are easier to keep a long time than the 

 phanerogams." It will repay careful reading 

 by every botanist who has before him the 

 problem of obtaining and maintaining a sup- 

 ply of fresh material of the algae. 



The same author in the same number of the 

 journal mentioned ventures a new interpre- 

 tation of the " knee joints " often observed in 

 Mougeotia, namely, that these bendings are 



the first stages of the fragmentation of the 

 filament, such fragmentation resulting in the 

 formation of as many new filaments. 



Ernst Hayren's paper on the " Algae of the 

 Eegion of Bjorneberg" (in Proc. Soc. Fauna 

 et Flora Fennica) is interesting because of 

 the ecological notes that he manages to intro- 

 duce. He includes observations on Chloro- 

 phyceae, Characeae, Phaeophyceae and Ehodo- 

 phyceae. 



" The Life History of Griffithsia horneti- 

 ana " is worked out in a paper in the October 

 (1909) Annals of Botany, by I. F. Lewis. It 

 is more than a report upon the structures 

 which he found in his studies, for he has 

 made it contribute to the discussion of the 

 nature of alternation of generations. The 

 conclusion is reached that in these algae 

 " there is an antithetic alternation of genera- 

 tions, the gametophyte being represented by 

 the sexual plants, the sporophyte by the 

 sporogenous cells of the cystocarp." Five 

 double-page plates beautifully illustrate the 

 paper. 



The unicellular fresh-water algae of the 

 Dutch East Indies are described and figured 

 in a recent paper by Dr. Ch. Bernard, and is- 

 sued as Bulletin XXIV., of the Department 

 of Agriculture at Buitenzorg. Our first re- 

 mark is upon the significant fact of its issu- 

 ance by a department of agriculture. Evi- 

 dently the Netherlandish agriculturists take 

 a very liberal view as to the matter for their 

 bulletins. The desmids and many Proto- 

 cocoideae are taken up in the paper, which is 

 accompanied by six good plates. 



Part I. of " The Marine Algae of Den- 

 mark," by L. K. Eosenvinge, has appeared as 

 one of the memoirs of the Eoyal Academy of 

 Sciences and Letters of Denmark. This part 

 includes the introduction of about fifty pages, 

 and about a hundred pages of descriptive text 

 of Bangiales and Nemalionales. This text is 

 well illustrated by text figures. Several maps 

 and plates also accompany the present part. 

 The work as a whole promises to be of great 

 importance. 



Charles E. Bessey 



The Univeesitt of Nebraska 



