262 Eumycetes. 



Atkinson, G. F., The perfectstageofthe Ascochyta on the 

 hairy Vetch. (Bot. Gazette. LIV. p. 537—538. 1912.) 



The author collected Vicia villosa affected by an Ascochyta- 

 After some time a number of perithecia were found, which proved 

 to belong to the genus Sphaerella {Mycosphaerella) although pycnidia 

 of the Ascochyta were present on the same pods. The germination 

 of the ascospores of the Sphaerella was studied and the growth of 

 the colonies was observed up to the formation of pycnidia and pyc- 

 nospores identical with those formed on the Vicia pods, evidence 

 that this Sphaerella was the perfect stage of the Ascochyta of the 

 Vicia. Further investigations on this fungus and some other species 

 of Ascochyta will be published later on. Jongmans. 



Barrett, J. T., The development of Blastocladia strangulata 

 nov. spec. (Bot. Gazette. LIV. p. 353—370. PI. 18-20. 1912.) 



A Single plant of this new species w^as discovered growing on 

 an aphid which had accidentally fallen into one of several water 

 cultures prepared for the purpose of entrapping various Phycomy- 

 cetes. The specific culture was made fromsoil and decayed Vegetation. 



Cultures were immediately started with aphids and other ani- 

 mal tissue, from which an abundance of material in all stages of 

 development was secured. A pure culture of the organism also is 

 obtained. The plant, from which a füll latin and english diagnosis 

 is given, resembles in general the other species of the genus. Its 

 mycelium is definitely constricted, which fact, it seems, definitely 

 places the genus in the family Leptoniitaceae. 



It possesses peculiar perforated pseudo-septa which are formed 

 at the constrictions, and which in a way are comparable to the 

 "cellulin rings" of other members of the Leptornitaceae . 



Zoosporangia are provided with a number of papiilae of dehis- 

 cence distributed over the surface, which are formed as the result 

 of the gelatinization of small circular areas of the wall. The resul- 

 ting plug is made up of two distinct parts, the inner of which 

 forms a vesicle into which the zoospores escape at the time of their 

 discharge. 



The zoospores possess a large centrally located subtriangular 

 mass of apparently some reserve food substance, probably proteid 

 in nature, at whose base is located the nucleus. They are typically 

 uniciliated, with the cilium in direct relation to the nucleus. 



Resting sporangia possess a three-layered wall; the outer and 

 inner layers thin and hyaline; and the middle thick, perforated 

 and orange colored. After a period of rest of several weeks, germi- 

 nation takes place by the formation of zoospores. 



On germination the zoospore produces a germ tube which forms 

 the basis of the rhizoid System, while the body of the spore beco- 

 mes the basal cell of the plant. 



Nuclear division is somewhat unusual, apparently, and reminds 

 one of amitosis. It seems to the writer, however, that it is more 

 probably a form of mitotic division dealing with a Single large 

 chromosome. Jongmans. 



Brown, W. H., The development of the ascocarp ot 

 Lachnea scutellata. (Bot. Gazette. LH. p. 275—305. 51 Fig. PI. 9. 1911.) 



The material upon which the present study is based was col- 



