264 Eumycetes. 



on the nuclear membrane and becomes connected with the chromo- 

 somes by linin fibers in the nucleus. The centrosome divides and 

 the daughter centrosomes come to be situated at the poles of the 

 spindle. The chromosomes divide transversely. As they approach 

 the poles they appear to split longitudinally. The second and third 

 divisions in the ascus are similar to those in the ascogonium. 



The spore wall does not appear to be formed by the fusion of 

 astral rays. Jongmans. 



Lewis, I. M., The development of the spores in Pleurage 

 sygospora. (Bot. Gazette. LI. p. 369—373. PI. 19. 1911.) 



The generic position of this species depends upon the Interpre- 

 tation which is placed upon the mature ascospore. Saccardo 

 described it as Phüocopra as he accepted the number of spores 

 being 16. Kuntze described it as a Pleurage with 8 spores. 



The present writer studied the development of the spores. The 

 sporogenous cells elongate and enlarge in all directions untill a 

 rather long filament is formed. In some cases cross-walls are formed 

 so that the filament becomes multicellular, in other cases cross 

 walls are never formed. About the time the filament has reached 

 its maximum length or slightly earlier, the two ends begin to en- 

 large, and the cytoplasm in these ellipsoid portions becomes very 

 dense. Each end portion usually contains a Single nucleus. In some 

 cases no nucleus migrates to the end of the filament, and in such 

 cases the end portion becomes abortive. In the case of the multi- 

 cellular type, the end portion which is enlarged, may consist of a 

 Single cell or of two or more cells. These enlarged end portions 

 become the fertile cells of the spore and each of these fertile por- 

 tions functions as a spore. The primary connecting filament persists 

 for some time, but at the maturity of the perithecium and the 

 shedding of the spores, it has almost disappeared, thus separating 

 the two portions, and the ascus produces, therefore, the functional 

 aequivalent of 16 spores. 



Functionally 16 spores are produced, but morphologically there 

 are only eight. These 8 spores are either three-celled, that is, two 

 fertile cells connected by a long multinucleate cell, or thej'' may be 

 multicellular, consisting of two fertile parts, connected by a long 

 multicellular sterile portion, which eventually disappears. The basis 

 of the structure and origin seems to the writer to be the proper 

 basis for their definition and therefore this species is regarded as 

 eight-spored, and the Classification of Kuntze as the proper one. 



Jongmans. 



Matheny, W. A., A comparison ofthe american Brown-rot 

 fungus with Sclerotinia fructigena a n d 5. cinerea of Europe. 

 (Bot.^ Gazette. LVI. p. 418-432. 6 Fig. 1913.) 



It is an open question whether or not the american brown-rot 

 fungus of stone fruits, called Sclerotinia fructigena , is identical with 

 the fungus bearing the same name and occurring throughout 

 Europe, but there found exclusively upon pome fruits. That 5. 

 fructigena should occur in Europe only on pome fruits and in 

 America only on stone fruits appears unusual and to many im- 

 probable. If vS. cinerea is the fungus attacking stone fruits in Europe, 

 then the Suggestion seems pertinent that the american brown-rot 



