lulu SUM-MAIIY OF CURKKNT UESEARCHES RELATING TO 



of respiration, and hence diminishes the quantity of these substances in 

 the berry. The percentage of sugar in proportion to other substances 

 is, however, increased. 



Stysanus and Hormodendron.* — MM. J. Costiintin and EoUand 

 describe the various stages in the development of Sfi/sanus, a genus of 

 Mucedinre not uucummon on excrement cultures. Also a new species of 

 the allied genus Hormodendron, which they call //. nigro-albiim, found 

 on the excrements of a fowl, springing up only after a long i)eriod of 

 rest. 



New Mould.| — Herr E. Eidam finds a new hyphomycetous fungus, to 

 which he gives the name Coemansia sjnralis, forming white spots on a 

 damp horse-cloth, characterized l)y the septate uubrauched couidiophores 

 being coiled spirally in their upper portion. 



Entomophthoreae of the United States.^ — Mr. E. Thaxter has com- 

 menced the publication of a monograph of the Entomophthorene of the 

 United States. There are three genera, Empma (including Entomo- 

 phthora and Triplosporium), Massospora, and Basidioholus. The publica- 

 tion commences with Empusa, of which twenty-six species are recognized, 

 sixteen of th jm new. 



Gonidia of Gyinnosporangium.§ — Herr F. Kieuitz-Gerloff has de- 

 tected two kinds of gonidia on Gymnospxirungiinn clavariseforme growing 

 on the juniper, one chiefly in the interior, the other near the periphery 

 of the fructification. Both are double spores, and about 0'09 mm. in 

 length. In the former tlie i>idicel has usually disappeared as mucilage ; 

 they arc equally pointed at the two ends, and strongly constricted in the 

 middle, and have a thin and colourless membrane, and finely granular 

 yellow-brown contents ; the latter are always stalked, more pointed at 

 one end than the other ; they have a scarcely perceptible constriction, 

 their membrane is dark brown and much thicker, and their contents are 

 not granular, resembling those of ordinary teleutospores. These latter 

 form, on germination, at most four, usually only one or two germinating 

 tubes, as is usually the case with teleutospores ; the former, on the 

 contrary, always form more than one, usually about five. He suggests 

 that the thin walled spores may possibly be the hitherto unknown 

 uredospores of Gymnosporangium. 



Recent Researches on the Saprolegnieae. || —Prof. M. Hartog dis- 

 cusses recent researches on the Saprolegniege, and more particularly 

 those of Rothert published in the ' Proceedings of the Cracow Academy,' 

 xvii., 1887. 



Rothert's i)aper afibrds the first full and complete account of the 

 double segregation and homogeneous stage, worked out independently, 

 but confirming the author's views as far as they go. His paper, how- 

 ever, does more than this ; it aifords the first complete account of the 

 formation of the zoosporangium, its septum, and the tubular process 

 through which the spores escape. 



The author then gives an abstract of Rothert's paper, and supple- 



* Bull. Soc. Bot. France, xxxv. (1888) pp. 296-302. 



t JB. Schles. Gesell. Vaterl. Cultur, 188/, pp. 21)2-5. See Bot. Centralbl., xxxv. 

 (1888) p. 304. 



X Proc. Boston Soc. Nat. Hist., iv. (1888) pp. 131-201 (8 pis.). See Bot, Gazette, 

 xiii. (1888) p. 194. § Bot. Ztg., xlvi. (1888) pp. 389-93 (1 pi.). 



II Ann. of Bot., ii. (1888) pp. 201-lU. 



