(330 SUMMARY OF CURRENT RESEARCHES RELATING TO 



appearance of the first spots on the leaves, the fungus propagated itself 

 by the aid of sjiores contained in receptacles (pycnidia). These spores 

 are ovoid and colourless, and easily germinated when the necessary con- 

 ditions of heat and humidity were furnished. It appears that the fungus 

 always attacks the leaves first ; the spores are 4hen conveyed from the 

 loaves to the grapes by rain. Besides the pycnidia, other smaller 

 receptacles may be seen ; these are the spermogonia which contain the 

 spermatia. The rule of these organisms has not yet been determined in 

 a satisfactory manner. 



Development and Fructification of Trichocladium.* — M. L. Dufour 

 states that Trichocladium asperum Harz, consists of long, colourless, 

 branched filaments, and on these are short ramifications which terminate 

 in a single spore. This spore is formed of two cells, the lower of which, 

 although smaller at first, gradually becomes as large as the upper one. 

 They are at first colourless, then brown, and finally black, and aro 

 tuberculatcd when mature. The author found that the liquid best 

 suited for the culture of this fungus was neutralized orange-juice. 



The commencement of gennination took place in twenty-four hours 

 after sowing. From one of the two cells of the spore, or sometimes 

 from both, a small colourless vesicle may be seen to grow, from which 

 arise some short and slightly branched germinating filaments. Tho 

 mycelium then increases, branching abundantly. The important points 

 to notice are that the mycelium is not septated, and that the spore is 

 bicellular, black, aud warty. 



Ceriomyces and Fibrillaria.t — According to M. J. de Seynes 

 Fihrillaria consists of radiciform threads analogous to the mycelium of 

 Glatlirns and Phallus, ramifying and anastomosing in a manner some- 

 what similar to Bhizomorpha, from which however it differs in colour ; 

 Ehizomorpha being black, and Fihrillaria white, or yellowish white. 

 Certain siiecinieus of Fihrillaria exhibit irregular nodosities along the 

 course of the radiciform threads. These bodies have been described 

 under the name of Ceriomyces by Corda. The author has, however, been 

 able to determine the comi^lete identity of Ceriomyces and Fihrillaria. 



New Genus of Sphaeriaceous Pyrenomycetes4 — Sig. P. A. Saccardo 

 gives descriptions of two species which form a new and very remarkable 

 type of Pyreuomycctes. The following is the diagnosis of the genus : — 



Berlesiella Saccard. Perithecia subcarbpnacea, atra, globosa, stromate 

 pulvinato vel hemispherico, v. effuso carbonaceo, inserta, discreta vel 

 basi tautum connexa, botryoso-prominula, setosa, ostiolo minuto vel 

 obsolete. Asci elongati (spurie paraphysati, octospori). Sporidia 

 ovoideo-oblonga, 2-pluri septata et muriformia, e hyaline flaveola. 



Berlesiella nigerrima gi'ows on Prunus Padus, and is often parasitic 

 on the perithecia of Eiitypella padina ; B. hirtella grows on tho branches 

 of Samhucus, near Rome. 



New Genus Peltosph3eria.§— Sig. A. N. Berlese gives the diagnosis 

 of a new genus of sphaeriaceous Pyrenomycetes, to which ho gives the 

 name of Peltosphseria : — 



Perithecia sparsa epidermide tocta ct basi ligno infossa, sursum 

 clypeo stromatico atro teeta, rare bina sub eodem clypeo. Ostiola vix 



* Dull. Soc. Bot. France, xsxv. (ISSS) pp. 139-44. f Hjitl- pp. 124-7 



; Kev. M) wl., x. (188S) pp. G-8 (1 pi). § Ibid., pp. 17-8 (I j.l.). 



