282 SUMMARY OF CURRENT RESEARCHES RELATING TO 



A species of Cucurbitaria, which is probably new (0, Platani ?), was 

 also observed. It appears to be a saprophyte rather than a parasite. Both 

 pycnidia and ascospores were observed. 



Protoventuria, a new genus of Pyrenomycetes.* — From the well- 

 known genus Venturia De Not., Sig. A. N. Berlese proposes to separate 

 F. Bosee as a distinct genus under the name Protoventuria Berl. et Sacc, 

 with the following diagnosis: — Perithecia superficialia majuscula carbo- 

 nacea fragilia globosa-depressa, vertice setis rigidis aterrimis longiusculis 

 vestita, basi setulis subtilioribus numerosissimis pallidis subtortuosis sep- 

 tatis cincta, poro rotundo amplo pertusa. Asci oblongi v. elliptici, basi 

 abrupte attenuati, in pedunculum brevissimum desinentes, octospori. Para- 

 physes nullae v. obsoletae. Sporidia constricto-didyma bilocularia, loculis 

 subfequalibus saturate fuligineis. 



New genera of Pyrenomycetes.f— M. N. Patouillard describes the two 

 following new genera of Pyrenomycetes, both from China. 



Cylindrina. Perithecia simple, somewhat horny, erect, cylindrical, 

 truncate, and hollowed at the summit into a cuj), in the centre of which is 

 a pore. Thecae cylindrical, greatly elongated. Spores filiform, continuous. 

 Paraphyses slender, simple, very numerous. Near to Acrospermum. G. 

 Delavayi was found on dead leaves of Liparis liliijlora. 



Pyrenotheca. Stroma bearing a large number of close rounded black 

 carbonaceous receptacles, formed of a homogeneous cellular tissue, hollowed 

 in its upper part by a large number of pits arranged irregularly in several 

 rows, and each inclosing a single globular or ovoid sessile theca containing 

 eight colourless ovoid septated muriform spores. Paraphyses 0. Near 

 to EurytJieca. P. yunnanensis, parasitic on the living bark of a Buxus. 



Tubercularia.l — Dr. F. Morini discusses the systematic position of this 

 genus of Fungi, and dissents from the conclusion of Gobi that it belongs to 

 the UstilaginefB. He regards the mode of sporification as differing essen- 

 tially from that in Entyloma, in the distinct differentiation of a mycelium 

 and fertile hymeuium, which does not exist in that genus. The cycle of 

 development of Tuhercularia is also altogether different from that which 

 occurs in the Ustilagineae. As regards its true position, Morini thinks that 

 Tuhercularia shows the greatest affinity with the Tremellini. 



Contrary to the view of de Bary, Morini regards the process of anasto- 

 mosis displayed by the sporidia of many Ustilaginese as a phenomenon of 

 simple fusion of cells, and as having no sexual character. 



Scandinavian Peronosporeae, Ustilagineae, and Uredinese.§— In a de- 

 tailed account of these parasitic fungi from the lofty mountains of Jamtland 

 and Harjedalen, Herr C. J. Johanson remarks on the comparative abundance 

 of the subgenera Leptopuccinia and Micropuccinia, distinguished by the 

 absence of the uredo- and aecidial forms. W hile in Germany the species 

 of these subgenera make up 33 per cent, of the entire genus Puccinia, in 

 Italy 30 per cent., and in Holland 25 per cent., in the districts above 

 referred to they amount to 60 per cent. The following new species are 

 described : — Peronospora alpina on Thalidrum alpinum, Puccinia rhytis- 

 moides on the same plant ; P. {Micropuccinia) ruhefaciens on Galium horeale, 

 P. (M.) scandica on Epilobium anagallidifolium. 



* Atti Soc. Ven.-Trent. Sci. Nat., x. (1886) pp. 171-5 (1 pL). 

 t Bull. Soc. Bot. France, viii. (1886) pp. 155-6. 

 : Malpighia, i. (1886) pp. 114-21. 



§ SB. Natm-vet. Studentsallsk. Upsalu, Oct. 12, 1886. See Bot. Ceatralbl., ixviii. 

 (1886) pp. 347 cl seq. 



