ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 749 



the extension of the disease. There was also a large quantity of manure 

 laid down, forming a rich nutriment for the fungus. The roots attacked 

 were completely invested by the mycelium ; scarcely a sound spot was 

 left. The writer tried treatment with lime to exterminate the disease, 

 without much effect. He recommends better draining of the soil, destruc- 

 tion of all diseased plants, and a change of crop for a number of years. 



Aspergilleae Parasitic on Human Beings.* — Bojana Mirsky 

 developed in artificial cultures Sterigmatocystis versicolor isolated from 

 the sputum of a tuberculous patient. It grew only at low tempera- 

 tures and formed rose-coloured patches as well as the usual green- 

 coloured tufts. 



Notes on Uredineae.t — Fr. Bubak has proved by experiments that 

 the Adoxa secidium is not a form of Puccinia Adoxce but of P. argentata, 

 the uredo form of which grows on Impatiens noli-tangere. 



P. Magnus J contributes notes of his observations on the occurrence 

 of the chrysanthemum rust in Europe. It is due, he thinks, to uredo- 

 spores rather than to teleutospores. He cites cases where uredospores 

 have been the agents of propagation. 



F. Bubak § publishes a preliminary note on Uredo Symphyti, the 

 ascidium form of which he produced on Abies alba. 



E. W, Holway |] advises as to the best methods for collecting and 

 preserving specimens of Uredinese, placing them in herbaria, mounting 

 slides, &c. 



H. Diedickelf has made culture experiments with Puccinia Stipce. 

 It forms cecidia on species of Thymus and also on Salvia silvestris. 



Mycoplasma Hypothesis.** — J. Eriksson publishes a reply to 

 Marshall Ward's criticism of his work on Uredinete. He had found 

 evidence for the growth of rust pustules without external infection in 

 plants that had been carefully kept from risk of spore contamination ; 

 and in the tissues of these plants he found what he considers to be the 

 hyphffi developing from the mycoplasma of the plant. Marshall Ward 

 had. pronounced these to be the cut-off ends of haustoria, and Eriksson 

 answers him and points out that Ward was in each case dealing with 

 directly infected material, whereas the bodies he described could only 

 occur in connection with pustules that had developed from the myco- 

 plasma in the plant itself. 



Changes produced in the Peridial Cell-Walls of the Uredinese.ft — 

 Oscar Magnus concludes his observations and experiments on this subject. 

 He finds that within a given species great variations may occur. In a 

 sunny locality the cell-wall is strongly developed ; in the shade the 

 lumen of the cell is comparatively much larger. He finds that this 

 development goes on parallel lines with the formation of the leaf-tissue, 

 with one exception, that of JEcidium Aconiti-N apelli. He did not find 



* These de l'Univ. de Nancy, 1903,76 pp. See also Bot. Centralbl., xciii. p. '271. 



t Centralbl. Bakt, x. (1903) p. 574. % Tom. cit., pp. 575-7. 



§ Ber. Deutsch. Bot. Ges., xxi. (1903) p. 356. 



i| Journ. Appl. Micr., v. (1902) pp. 2075-0. 



i Ann. Mycol., i. (1903) pp. 341-3. 



** Arkiv. Bot. K. Svensk. Vetenskapsakad., i. (1903) pp. 139-46. 

 ft Centralbl. Bukt. x. (1903) pp. 700-21 (27 figs.). 



Dec. 16th, 1903 3 C 



