504 SUMMARY OF CURRENT RESEARCHES RELATING TO 



in size, and three zones can be seen corresponding to the trama, the 

 hymenophore, and the cortex, the whole surrounded by the veil. The 

 development of these different tissues is followed in detail, and the points 

 of difference between this and other Agarics is indicated. 



Luminosity in Fungi.* — W. A. Murrill contributes some observa- 

 tions he has made on this subject, though much remains to be learned 

 about the subject. In animals such light is usually brief and inter- 

 mittent, but certain fungi may give off light continuously for days, 

 weeks, or even months, so long as the light-giving cells are uninjured 

 and active and water is present. Luminosity seems to have no special 

 biological significance in fungi. In general, it seems to be located in 

 actively growing cells, and only in certain parts of the fungus. Murrill 

 gives a list of American species that are luminous, and records his ex- 

 periences in collecting and watching these species, and the conditions in 

 which they glowed. 



Cryptoporus volvatus.f — Notes on the genus Cryptoporus are given 

 by S. M. Zeller. It is peculiar in that the pore-bearing layer is bidden 

 by a volva. At first the plants are small globose " buttons " covered 

 with a thick crust of reddish-brown resin from the coniferous trees on 

 which they are parasitic.' As the fungus matures an ostiole is formed 

 near the tree-trunk. Successful cultures were made of the first stages, 

 and conidia were produced, but with basidiospores. The relation of the 

 fungus to insects is discussed, and their service in disseminating the 

 spores. 



The Genus Muciporus.J — H. 0. Juel has published some observa- 

 tions on Muciporus, a genus of Hymenomycetes with a flat wide- 

 spreading sporophore, thickly-crowded pores with a somewhat mucila- 

 ginous consistency, and a quickly disappearing hymenium. He describes 

 one of the species, formerly classified as Polyporus corticola, generally 

 found in a sterile condition. He found specimens in the spore-bearing 

 stage, and he has described and figured the sterigmata and spores, and 

 the paraphyses or cystidia, generally tipped by a calcium-oxalate crystal. 



Contributions to Fungus Floras. — X. Ranogevic § gives a third 

 list of fungi collected in Serbia during 1910-11. The present con- 

 tribution comprises only microfungi ; with each species is given the 

 various localities where it was found. Two new genera are described : 

 Microbasidium, a genus of Dematiese, the species of which grow on 

 living leaves of Sorghum — it is distinguished by the simple brown spores, 

 and has something of the habit of Moicladium. The other. Dendry- 

 phiella, also one of the Bematieas, with clustered conidiophores and 

 septate brown spores. In addition, nineteen new species are described. 



Otto Jaap |] has given lists of fungi from Thuringia ; they include 



* Mvcologia, vii. (1915) pp. 131-3. 

 t Mvcologia, vii. (1915) pp. 121-5 (1 pi.). 

 t Ark. Bot., xiv. (1915) pp. 1-9 (1 pi.). 

 § Ann. Mvcol., xii. (1914) pp. 393-421 (5 figs.). 

 || Ann. Mycol., xii. (1914) pp. 423-37. 



