ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 'loD 



Contribution to the Study of the Brazilian Mycological Flora. — 

 A. Maublaxc {Bull. Soc. Glycol. France, 1920, 36, :)3-43, 3 pis.) made 

 a large collection of fungi, more particularly of plant parasites, during 

 a two years' residence in Brazil. His intention is to publish a com- 

 plete list of his plants, but meanwhile he is issuing descriptions of 

 new fungi. These include Pyrenomycetes and Sph^ropsideae, with one 

 new genus, Uroiwly stigma (Nectriace^e). A. L. S. 



Phomopsisjuniperovora, a New Species causing Blight of Nursery 

 Cedars. — Glexn Gardner Hahn {Phytopatholoyij, 1920, 10, 249-53, 

 1 fig.). The fungus occurs on the needles and stems of Junipenis 

 virginiana. The author noted two types of spores, the usual oblong or 

 ellipsoid spores, and long narrow curved spores, which he terms scoleco- 

 spores. A. L. S. 



Study of Fusarium. — Z. Paravicini {Ann. Mycol, 1918, 16, 

 300-19, 1 pi.). The author set out to examine the Fiisaria that cause 

 rottenness of fruits, and to observe the occurrence of anastomosis and its 

 significance. The principal agent in causing the rot is Fusarium 

 putrefaciens. Paravicini by his cultures obtained growths of two new 

 species, F. hitewn and F. rtibrum ; full particulars of these are given. 

 He observed anastomosis in the mycelium and between spores. There 

 was no evidence of any sexual act. Anastomosis took place unfailingly in 

 the hanging-drop cultures, but still more surely if the drop became 

 concentrated by evaporation. A. L. S. 



New Genus of Hyphomycetes. — Komualdo G. Fragoso (Bol Real 

 Soc. Esp. Hist. Nat., 1920, 20, 112-4, 3 figs.). The new genus 

 belongs to the Dematiese, and is characterized by large septate spores 

 curved at the ends. It grows on Sphagnum squarrosum, and has been 

 named Oasaresia sphagnorum. A. L. S. 



Puccinia obscura and Related Pucciniae on Luzula. — P. Dietel 

 {Ann. Mgcol, 1919, 17, 48-58). Puccinia olscura is distinguished 

 from other forms on Luzula by the large uredospores. Dietel has tested 

 the size of these spores by many measurements, comparing those from 

 different Luzulse. He made the same measurements and comparisons 

 with the teleutospores, noting in both series of experiments the colour 

 as well as the size. A. L. S. 



Structure of the Uredinium in Pucciniastrum Agrimoniae. — 0. A. 

 LuDWiG and C. C. Rees (Amer. Journ. Bot., 1918, 5, 5.5-6(i, 1 pi.). 

 In this species the uredinium begins as a small aggregation of hypha3 

 under the epidermis, which is finally burst. The mesophyll tissues of 

 the host are scarcely affected. At maturity the sorus is bounded above 

 and at the sides by a peridium of somewhat overlapping, thin-walled 

 cells, but of considerable tensile strength, as the sorus maintains its 

 shape and the only escape for the spores is by a central ostiole. When 

 this stage is reached the peridium begins to disintegrate. The mature 

 spores are catenulate and echinulate. The authors suggest new methods 

 of arrangements in the Fucciniastratse to which this rust belongs. 



A. L. S. 



