028 SUMMARY OF CURRENT RESEARCHES RELATING TO 



circular outline becomes occasionally polygonal, autl normally so in J. 

 j)ohj<jotui8. (2) Surface : — elevations and inflations of various kinds occur 

 in different species. (3) Colour : — differences of colour in mature valves 

 depend on the thickness of the valve, those having the superficial layer 

 absent from certain portions being lighter there than elsewhere. (4) 

 Central space : — in some species the central space is uniform in outline 

 and dimensions, while in others it varies. (5) Markings : — variations 

 are constantly met with in the degree of distinctness of the individual 

 markings, arising from their greater or less elevation above the general 

 surface. (6) Primary rays: — the number of these is extremely variable, 

 from entire absence in abnormal forms of A. Kittoni to 45 in A. orientalis, 

 and they are far from constant even in the same species, (7) Processes : — 

 these vary in their distance from the circumference, and arc altogether 

 wanting in A. apedicellatHS and A. suspcdus, and in abnormal forms of 

 A. Kittoni. 



Fungi. 



Blue Coloration of Fungi by Iodine.* — M. L. Eolland records 

 several instances in which tho tissues of Fungi give the blue reaction 

 with iodine alone. This occurs with the hairs and fibres of the stipes 

 of Mycena tenerrima, a small agaric growing on the bark of poplars in 

 the neighbom-hood of Paris ; also in the sijores of Cyjjliclla vitcllina, a 

 new Hymenomycete from Chile. 



Classification and Description of Fungi.f — Herr H. Karstcn com- 

 ments on and criticizes various points in Winter's Monograph of the 

 German Fungi in Rabenhorst's ' Cryptogamen-Flora von Deutschland ' ; 

 some details of the classification adopted, and also the terminology, 

 nomenclature, and synonymy. 



Biological Studies of Fungi-I— M. P. Vuillemin describes a new 

 Entomoplitlwra, E. glceospora, parasitic on flics. The mycelium is formed 

 of elongated branched filaments, with here and there dense tufts of 

 hyphjB, which ramify several times, each of the ultimate branches forming 

 a spore at its apex; the spores give birth, on germinating, either to 

 sporidia or to a mycelium. The mycelial filaments are uusejitated, but 

 contain a number of nuclei dispersed with great regularity, each segment 

 containing several. Each spore contains a nucleus, which passes into 

 the sporidium when this is formed from it. 



After an account of the life-history of Mucor Jieterogamus,% M. 

 Vuillemin describes two new species of the genus : — M. neglectus, a very 

 small species, with the sporangiophores branching in a sympodial manner, 

 and M. ambiguus, with coiled sporangiophores resembling those of Circi- 

 nella. He states that the sporangium of 3Iucor does not dehisce at all 

 when the atmosphere is very dry. 



Further notes follow on some species of Ascomycetes. The author 

 confirms Tulasne's statement that TricTioderma viride is a conidial form 

 of Hi/pocrea riifa. The name Melanospora Fai/odi he gives to a fungus 

 growing on Leotia hihrica, which had been called by Fayod Hypomyces 

 Leotiarum ; he has observed its ascospores, and has also discovered 



* Bull. Soc. Glycol. France, 18S7, p. 134. See Kev. MycoL, x. (1888) p. 49. 

 t Flora, Ixxi. (1888) pp. 49-61, 6n-80. 



: Bull. Soc. Sci. Naucy, 1887. See_Morot'8 Journ. Bot., ii, (1888) Rev. Bibl., 

 P- 1^- § See this Jouraa), 1887, p. 281. 



