142 Algae. — Eumycetes. 



Gattung {Chondriopsis) vereinigt; in verschiedene Gruppen der 

 Rhodoinelaceen sind diese zwei Gattungen nicht zu stellen. 



7. Neue Arten sind: 



Antithaniniion spivogvaphidis Schffn. n. sp. aus den Triester 

 Hafen, mit A. ßoccosum ^Müll.) Kleen und A. siihulahmi Harv. nächst 

 verwandt und mit diesen zu einer Gattung {Haplocladium) zu ver- 

 einigen und von Antithaniniovi zu trennen. — Sperynothaninion 

 exignum Schffn. n. sp. von Cherso und Rovigno, verwandt mit 

 Sp. inordinatum {Z.2in.) Hauck. Matouschek (Wien). 



Arnes, A., The temperature relations of some Fungi 

 causing storage rots. (Phytopathology. V. p. 11 — 19. 1915.) 



The investigation was undertaken with a view of getting some 

 exact data on the thermal relations of a few of the fungi causing 

 storage rots. The fungi selected for this work were GlomereUa nifo- 

 maculans (Berk.) Sp. et von Seh. and Cephalotheciiun roseuni Corda 

 from apples, Thielaviopsis pavadoxa (de Seyn) Höhn, from pineapple, 

 Penicüliutn digitatuni (Tr.) Sacc. from orange, Rhisopus nigricans 

 Ehrenb. from sweet potato and Monilia fructigena Pers. from plums. 

 The experiment was divided into three parts: 1. The maximum and 

 minimum temperatures for spore germination were determined and 

 the time required for germination at different temperatures. 2. The 

 amount of growth and fruiting at various temperatures. 3. The 

 thermal deathpoint of spores exposed in a given Solution to the 

 heat of a water bath for a given period. The results were asfoUows: 

 The Cardinal points are within the limits stated in general for fungi 

 by other workers. Monilia and Penicillium germinate at 0° C but 

 growth is very slow. The other fungi do not develop below 5° C 

 but if growth is started at a higher temperature, it can continue at 

 this temperature. Aside from Rhisopus none of the organisms is 

 able to germinate above 36° C. The Optimum temperature of growth 

 for Monilia and Penicilliuin is 25° C; Thielaviopsis, GlomereUa and 

 Cep halothecimn 30° C, Rhisopus 36° C. The thermal deathpoint of 

 Rhisopus is 60° C, of Penicillium 58° C, and those of the remaining 

 fungi between 51° C and 53° C. The results indicate that in refrige- 

 rating experiments, temperatures near zero must be maintained if 

 development of rot producing fungi is to be entirely avoided. From 

 the effect of the exposure to low temperatures on the germination 

 of the spores, one can also conclude that the conidial forms offungi 

 are much more resistant to cold than is commonly supposed. 



M. J. Sirks (Haarlem). 



Atkinson, G. F., The development of Amanitopsis vaginata. 

 (Ann. Mycol. XII. p. 369—392. 3 Taf. 1914.) 



Die jüngsten, etwa 1 mm breiten und 1,25 mm langen Basidio- 

 carpe von Amanitopsis vaginata sind in Knolle oder Fuss (sterile 

 Basis) und in eine schmalere fertile Zone differenziert. Diese ring- 

 förmig um die Achse verlaufende fertile Zone ist durch eine 

 schwache Einschnürung von der sterilen Basis abgegrenzt. Das 

 erste Zeichen einer Differenzierung in dem fertilen Teil ist eine 

 bikonvexe oder schwach kuppeiförmige Region nahe dem oberen 

 Ende. Es ist dies der erste Anfang des Hutes oder von Hut und 

 Hymenophor zugleich. Das Gewebe ist in dieser Region ebenso 

 gebaut wie in der Umgebung, doch von dichterem Gefüge und 

 stärker färbbar. 



