130 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Fhoma uvicola with a couceptacular form of GUosporium ampelinum being 



erroneous, « ,, , ^ . r. 



The authors describe also three other parasites of the berry ol the grape, 

 Phoina fiaccida, P. reniformis, and Coniothyrium diplodella, which have some 

 analogy with " black-rot," but differ in causing no important injury. 



Fungus of the Root of the Vine.* — Herr J. B. Schnetzler records 

 for the first time the observation of fructification on the mycelium of 

 Agariciis melleus, which is so common on the roots of diseased vines. The 

 mycelium of Dematophora necatrix is also abundant in similar situations, 

 and is not to be confounded wnth the former. 



Fungi of Nova Zembla.t— In the collection of dried plants brought 

 from Nova Zambia by M. Weber, Dr. C. A. J. A. Oudemans finds a large 

 number of parasitic fungi, including the following new species : — Pleospora 

 Arctagrostidis on Ardagrostis latifolia, Leptosphderia Hierochlose on Hiero- 

 chloe alpina, Septoria Erioj^hori on Eriojyhorum angustifolium, Pleospora 

 Cerastii on Cerasiium alpinum, Leptospliseria Weheri, Spliserella nivalis, and 

 Metasphseria Annse on Banunculus nivalis, Ascochyta Papaveris on Papaver 

 nudicanlis, A. Drahse on Draha alpina, Sphaerella octopetalse on Bryas octo- 

 petala, Sphserella Potentillse and Microthyrium arcticum on Pofentilla fragi- 

 formis, Phoma Astragali dpini on Astragalus alpinus, Phoma Polemonii on 

 Polemonium pidchellum. 



Rabenhorst's Cryptogamic Flora of Germany (Fungi).— Parts 22-26 

 of this work are still entirely occupied with the Sphferiacege, the principal 

 freuera described being Mussaria {27 sp.), Gnomonia (37 sp.), Diarporthe 

 (132 sp.), Valsa (111 sp.), Valsella (18 sp.), Anthostoma (20 sp.), Melanconis 

 (20 sp.), Calosphseria (18 sp.), Diatrypella (24 sp.), and a portion of 

 Hypoxylon. 



Protophyta. 



Relationship of the Chlorophyllous Protophyta to the Protonema of 

 Mosses. I — Following out the observations of Hicks § on the relationship 

 between the gonidia of lichens and certain stages in the development of the 

 protonema of mosses, Dr. A. Hansgirg states that it is common to find, 

 among the Chroococcaceae and Palmellacese which are so abundant on the 

 damp walls of hothouses, branched filaments of moss-protonema, some 

 of the cells of which resemble externally the ordinary cells of the pro- 

 tonema, but the contents of which are strikingly difierent. Some of these 

 cells, which may also be occasionally found in the open air, contain chloro- 

 phyll-grains of a pale yellow-green colour and undefined outline imbedded 

 in yellowish-green cytoplasm ; while in others the chlorophyll-grains had 

 entirely disappeared, and the entire cytoplasm assumed a uniform golden 

 colour, owing to the presence of drops of a fatty oil. By pressure or the 

 resorption of the cell-wall these cells may be set free, and may lie isolated 

 in the surrounding mucilage. Microchemical reactions indicate that the 

 contents probably consist partly of a fatty oil, partly of reduced chloro- 

 phyll. Such isolated cells commonly still retain their cylindrical form, 

 and bear a close resemblance to CyUndrocystis. In some of these cells the 

 author observed the green pigment more or less collected in the centre 

 of the cell, while in others were two eccentric nucleus-like bodies or well- 



* Bot. CeiitmlW., xxvii. (188G) p. 274. 



t Versl. en Meddcd. K. Akrul. Weten. Amsterdam, 188C, pp. 146-62 (3 pis.). 

 J Flora, Ixix. (1886) pp. 291-303. 



§ Quart. Jouni. Micr. Sci., 1861 ; Trans. Linn. 8oc. Lond., 1862 ; and Trans. R. Micr. 

 Soc., 1S64, p. 257. 



