Eumycetes. 253 



The ripe ascospores will germinate directly after a prolonged 

 resting- period, which may be curtailed or eliminated by a prelimi- 

 nary treattnent of the spores with artificial gastric juice, but not by 

 subjection to low temperatures. It was found that ascospores treated 

 with varioiis strengths of acids did not germinate, — hence the 

 action of gastric juice in stimulating germination is entirely a 

 digestive one. 



The fuU-grown unripe ascospores and the chlamydospores will 

 germinate immediately in the absence of digestive treatment. 



E. M. Wakefield (Kew). 



Grove, W. B., Mycological Notes. III. (Journ. Bot. LV. p. 

 134—136. May 1917.) 



Amphichaeta europaea, Grove, is described as new. This is the 

 first time the genus Amphichaeta has been recorded in Europe, 

 although the present species was found by Briard, and referred 

 as „Pestalossia monochaetoidea var. ajfinis, Sacc. & Br." 



Notes are given on four other microfungi of interest. 



E. M. Wakefield (Kew). 



Harshberger, J. W., A Text-book of Mycology and Plant 

 Pathology. (Philadelphia, P. Blakiston's Sons & Co. 779, VII 

 pp. 271 ill. 1917.) 



The book comprises four distinct subjects each designated as 

 a „Part." 



Part I. Mycology: Chapters 1—22, p. 1 — 271. This parts treats 

 in a thoroughly comprehensive manner the Myxomycetes, ßacteria 

 and True Fungi from the view points of taxonomy, general morpho- 

 logy, chemistry and histology, ecology, geographic distribution, 

 fossil forms, phylogeny. 



Part II. General Plant Pathology: Chapters 23—32, p. 271—411, 

 deals with such general topics as predisposing causes, epiphytism, 

 Prophylaxis, dissemination, tree-surgery, internal causes of disease, 

 enzymes, chimeras etc., symptomology. morbid anatomy and galls. 



Part III. Special Plant Pathology: Chapters 33—36, p. 411—581. 

 This part consists essentially of „a list of the common and impor- 

 tant diseases of economic plants in the United States and Ca- 

 nada" arranged alphabetically by the common name of the host 

 and accompanied by one or more citations to pertinent literature. 

 This list is followed by some 70 odd pages of detailed account of 

 specific diseases, and a chapter of 17 pages concerning nonparasitic 

 diseases. 



Part IV. Laboratory Exercises in the cultural study of fungi: 

 Chapters 37—38, p. 581 — 779. Eleven appendices foUow, treating of 

 fungicides, spray calendars, mushroom culture, synopses and keys 

 to various families or genera, and directions for collecting and pre- 

 serving fungi. Helpful bibliographies are appended at the close of 

 each subject. F. L. Stevens. 



Muppill, W. A., Agaricaceae, Agariceae (pars). (N. A. Flora. X. p. 

 145— 236. June 25, 1917.) 



Contains as new: Tapinia lamellosa {Merulius lamellosus Sow.), 

 T. cotnigata {Paxillus comigatus Akt.), Cvepidotiis hygrophaniis, C. 

 fraxinicola, C. alabamensis, C. Betulae, C. fulifihrillosus, C. flatn- 



