78 Journal of Mycology [Vol. \% 



scribed in this paper by Dietel. About two dozen pages are de- 

 voted to a review of the literature, the ^Morphology Relationship, 

 Distribution, Synopsis, etc. The species are fully described, syn- 

 onomy, hosts and distribution given and the literature cited under 

 each species. Long's Pleoravenelia and Neoravenelia are not 

 accepted as valid genera. For the Ravenelias in the narrow 

 sense the new Section HaploravcneVm is proposed. Pleoravenelia 

 is used as a Section to include the remaining species. Five new 

 species from Mexico are described. 



Nichols, Susie Percival. 



This study of "the Nature and Origin of the binucleated 

 cells in some Basidomycetes," Trans. Wise. Acad. Sci. Arts and 

 Let. 15:30-70, PI. VI^ 1905, deals with Hypholoma perplexum 

 Pk., Coprinus, Poria, Pholiota praecox, Lepiota naucina, Dictyo- 

 phora duplicata, and Lycoperdon pyriforme. The results ob- 

 tained show that the binucleated cells do not originate through 

 the formation of an especial reproductive apparatus. Their for- 

 mation is not necessarily followed immediately by the formation 

 of a carpophore. At present there is no evidence that the binu- 

 cleated cells of Basidiomycetes ever originate by a fusion of their 

 adjacent cells such as Blackman finds at the base of the aecidium 

 in Phragmidum violaceum and Gymnosporangium clavariae- 

 forme. 



Journal of Mycology. Vol. 13, Jan. 1907. 



The table of contents is as follows : Morgan — North 

 American Species of Lepiota (concluded); Kern — The Rusts 

 of Gautemala ; Beardslee — The Lepiotas of Sweden ; Arthur — 

 New Genera of Uredinales ; Kauffman — The Genus Cortina- 

 rius with Key to the Species ; Editor's Notes. 



Morgan, A. P. 



In the January No. (1907) of the Journal of Mycology Prof. 

 A. P. Morgan concludes his paper, "North American Species of 

 Lepiota." It was begun in the July No. (1906) ; installments ap- 

 peared also in the September, and November Nos. The author 

 includes 90 species in the monograph, several of them being new. 

 Concise but ftill descriptions are given. The main groups of 

 species are eleven in number, arranged under three sections : an- 

 niili infcri, annuJi niobilis, and annuli superi. In addition synoptic 

 descriptive lines are used at proper intervals, greatly facilitating 

 the use of this important paper on our Lepiotas. Professor Mor- 

 gan's wide acquaintance with the species enables him to prepare 

 admirable descriptions ; but partial synomy is given. 



