82 SUMMARY OF CURRENT RESEARCHES RELATING TO 



C l a r k, H. W. — The Holophytic Plankton of Lakes Atitlan and Amititlan, Guatemala. 



[Includes three new species — Clathrocystis robusta, Staurastrum Evcrmanni, 

 Conferva gyrans.] Proc. Biol. Soc. Washington, xxi. (1908) pp. 91-105. 



Drabble, E. & H.— Hydrodictyon reticulatum Lagerh. 



[Abundant, in August 1908, in the River Idle, North Nottinghamshire.] 



Joum. of Bot., xlvi. (1908) p. 365. 

 Edwards, A. M.— Bacillaria : what are they ? 

 [A remarkable short essay upon Diatoms.] 



Mim. Soc. Sci. Nat. Cherbourg, xxxvi. (1907) pp. 429-32. 



Hall, as, E. — Om (Edogoniuni inclusum Hirn. 



Bot. Tidsskr., xxviii. (1907) pp. 211-13 (figs.). 



Hattori, H. — Vorlaufige Mitteilung iiber das Phytoplankton vom Suwa-see. 

 (Preliminary account of the phytoplankton of the Suwa lake.) 



Tokyo Bot. Mag., xxii. (1908) pp. 121-6 (figs.). 



L art br, C. E. — North Devon Cryptogams: Algse. 



[Records Ceramium circinatum Ag., as an addition to the local flora ; and 

 adds notes on the occurrence of the recently described Callymenia 

 Larteria, Holmes.] Joum. of Bot., xlvi. (1908) p. 393. 



Svedelius, N. — Frans Reinhold Kjellman. 



[Obituary notice of Prof. Kjellman of Upsala, algologist, with portrait and 

 list of seventy-one published works. Born, 1846 ; died, 1907.] 



K. Svensk. Vet. Akad. Aorsbok, 1908, pp. 279-300 (pi.). 

 See also Obituary Notice in Proc. Linn. Soc, 1907-8, pp. 50-3. 



Fungi. 



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



Swiss Mucorini.* — Alf. Lendner has edited the section of Swiss 

 Cryptogamic Flora dealing with the Mucorini. He gives great attention 

 to the conditions and circumstances of habitat and development of these 

 plants, and recounts how he was able to obtain cultivations of a large 

 number of the species dealt with. He compares genera and species one 

 with another in their vegetative and reproductive organs, citing the work 

 of others as well as his own observations on morphology and histology. 

 The second part of the book is devoted to classification, the Mucorini 

 being divided into families : Mucoraceae, Thamnidiacese, Pilobolacese, 

 Chaetocladiaceae, aud Cephalidacea?. The two latter include the conidia- 

 bearing genera, such as Chmtocladium, Piptocephalis, etc. A copious 

 bibliography and index complete the volume. The genera and species 

 are illustrated by figures in the text, and three plates give enlarged 

 drawings of the zygospores of Sporodinia grandis, to illustrate the 

 details of nuclear and protoplasmic structure. A number of new species 

 are described in the course of the work. 



Genus Pythium and some Chytridiaceae.t — This memoir by Butler 

 includes a monograph of the genus Pythium, which he divides into two 

 subgenera : — 1. Aphragmium, in which the species produce neither 

 conidia nor sporangia, the zoospores arising in undifferentiated cells of the 

 mycelium ; they are all water forms. 2. Sphwrosporangium, which in- 



* Flore Crvptogamique Suisse. Berne : K. J. Wyss, 1908, iii. fasc. 1, 180 pp. 

 (3 pis. and 59 figs.). 



f Mem. Dep. Agric. India, February 1907. See also Zeitschr. Pflanzenkr. 

 xviii. (1908) pp. 243-4. 



