— 13S — 



6. The cells of the ascogonium contain nuclei of two types. Some 

 smaller, others larger. The latter must, perhaps, be considered as 

 grown nuclei, ready for dividing. " 



7. The ascogenous hyphae, containing a great number of nuclei 

 disposed in paii-s, bend over at the tips and form bent ends, from 

 the penultimate cells of vvliich asci develop. 



8. At the development of the peritliecium of Sporormia intermedia 

 the cells of the mycelium give off a chain of short cells, wliich 

 divide and form knots. All the cells of a knot are, at first, 

 аИке. Later in the centre of the knot, some cells differentiate and 

 form the .,Woronin hyphae", which give rise to the ascoge- 

 nous hyphae. 



9. All the cells of a young perithecium in S. intermedia, are at 

 first uninucleate. The cells Avhich form the „Woronin hyphae", con- 

 tains a small quantity of nuclei and dense substance. 



Concluding this study, I wish to express sincere tlianks to 

 Mr. L. I. Kurssanow, under whose direction this Avork proceeded, 

 and prof. M. I. Golenkin for his kind permission to work in the 

 Laboratory of the Morphol: and System: of plants, in Moscow 

 University. 



References. 



1. Do Bary, 1SS4. Vergleichende Morphologie und Biologie der 



Pilze, Mycetozoa und Bacteria. 



2. Brooks, 1910. The Development of Gnomonia. An. of Bot. 



3. Brown, 1913. Studies in the Development of Xylaria. An. Mycol. 



4. Ca vara et Mollica, 1907. Eicerche interno al cicle évo- 



lutive di una interessante forma di Pleospora herbar um. 

 An. Mycol. 



5. Claussen, 1907. Zur Kenntniss der Kernverhältnisse von 



Pyronema confluons. Ber. d. Deut. Bot. Ges. XXV. 



6. Claussen, 1912. Zur Entwickelungsgeschichte der x\scomyce- 



ten. Pyronema confluons. Zeit. f. Bot. ^ 



7. Cutting, 1909. On the sexuality and development of tlie asco- 



carp in Ascophanus carneus. An. ot Bot. 



