66 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
exclusively as a sprouting yeast fungus, and its re-conversion into a 
mould fungus, lias been attained. The conditions under which this con- 
version takes place will shortly be published in extenso , as also will the 
conditions in which endogenous spores appear in a mould fungus having 
all the characteristics of Dematium pullulans. 
Variation in Teleutospores.* * * § — Mr. J. A. Warren points out the great 
variation in the number of cells in the teleutospores of Puccinia Wind - 
sorise. Out of 572 spores examined, 27 consisted of 3 or 4 cells instead 
of the normal number of 2. Sometimes the basal, and sometimes the 
apical cell would be divided by a longitudinal septum ; the 3 or 4 cells 
were sometimes arranged in a row, or, in the latter case, the 4 cells had 
sometimes a cruciform arrangement. 
Uredineae.')' — In the commencement of a monograph of the Swiss 
species of Uredineae, Herr E. Fischer gives the result of a number of 
new culture-experiments and observations on different species, together 
with some general conclusions. He adduces examples of the phenomenon 
that certain heteroecious Uredineae produce, on the host-plants of the 
aecidial generation, “ leptoforms,” less often “ microforms ” or “ liemi- 
forms,” the teleutospores of which agree nearly or entirely with those of 
the heteroecious species. The same host-species, growing in different 
districts, may exhibit different powers of resistance to infection by the 
same parasitic fungus. Species are described in detail belonging to the 
genera Gymnosporangiuni, Cronartium , and Coleosporium. 
New Genera of Uredineae.^ — Among the results of the first Eegnell 
expedition, Herr H. 0. Juel finds material for establishing two new 
genera of Uredineae. 
Chaconia g. n. Teleutosporae e cellulis basalibus successive enatae, 
non pedicellatae, unicellulares, membrana tenui prasditse, statim germi- 
nantes, promycelio apicali brevissimo, quadricellulari, sporidia gignente ; 
pycnidia, aecidia, uredo, ignotae. 
Leptinia g. n. Teleutosporae e strato subepidermali cellularum 
brunnescentium successive enatae, e cellulis binis inter se oblique con- 
natis compositae, membrana tenuissima instructs, poris carentes, pedicel - 
latoe ; germinatio fere Leptopuccinise ; pycnidia, aecidia, uredo, ignotae. 
Classification of Agaricaceae.§ — Engler and Prantl propose the 
division of the Agaricaceae into the following families : — Cantharelleae, 
Paxilleae, Coprineae, Hygrophoreae, Lactariaceae, Schizophylleae, Maras- 
mieae, and Agariceae. 
Thermophilous Microbes. || — Dr. Tsiklinsky records two examples 
of Actinomyces vegetating between 48° and 68° C. Thermoactinomyces i., 
isolated from the soil, presents itself as wavy, straight, and ramified fila- 
ments, about 0*5 fj, broad. It forms spores. It is easily stained by the 
ordinary anilin dyes and also by Gram’s method. It vegetates from 
* Amer. Nat, xxxii. (1898) pp. 779-81 (26 figs.). 
t Entwickel.-Unters. iib. Rostpilze, Bern, 1898, Bd. 1, Heft 1, 121 pp., 2 pis., 
16 figs. 
f Bih. k. Svensk. Vetensk.-Akad. Handl., xxiii. (1898) Afd. 3, 30 pp., 4 pis. 
(German). 
§ Engler u. Prantl, Natiirl. Pflanzenfamilien, i. 1, Leipzig, 1898. See Hedwigia, 
xxxvii. (1898) Rep., p. 170. || Ann. de Micrographie, x. (1888) pp. 286-8. 
