March, 1920] MOKPHOLOGY, ETC., OF FUNGI, BACTERIA, ETC. 103 



703. Evans, Alexander W. A taxonomic study of Dumortiera. Bull. Torrey Bot. 



Club 46: 167-182. 1919. — A history of the genus Dumortiera is given with an account of the 

 scope of the genus and its treatment by other workers. Many of the. species are based on 

 unsatisfactory characters; a discussion of the merit of the following is given: branching of 

 the thalluSj structure of the thallus, receptacles, and spores. Of the 10 species that have 

 been referred to the genus, 3 belong to other genera; using the structural features of the 

 thallus as a basis the writer recognizes at present only 2 species, D. hirsuta (Sw.) Nees and 

 D. nepalensis (Tayl.) Nees, both of which are widely distributed. — P. A. Munz. 



70-4. Hurst, C. P. Ilfracombe mosses and hepatics. Jour. Botany 57: 91-97, 119-124. 

 1919. — The report is based on collections made in 1917 around Ilfracombe and on Braunton 

 Burrows, North Devonshire, England. Lists of mosses and hepatics, with notes and discus- 

 sions, are given. — K. M. Wiegand. 



MORPHOLOGY AND TAXONOMY OF FUNGI, BACTERIA AND 



MYXOMYCETES 



E. W. Olive, Editor 



705. Anderson, P. J. Index to American species of Phyllosticta. Mycologia 11: 66-79. 

 1919.— This index is designed to supplement "The North American Phyllostictas" by Ellis 

 and Everhart. Forty-one new species, 20 species reported for the first time, 116 new hosts, 

 and transfers which have appeared since the publication of Ellis and Everhart's monograph 

 are included. Citation of literature is given under each species and a host index presented 

 which includes all species on which Phyllostictas have been reported. No attempt is made 

 to trace synonomy. — H. R. Rosen. 



706. Atanasofp, D. A novel method of ascospore discharge. Mycologia 11: 125-128. 

 Fig. 1-3. 1919. — In certain Pyrenophora species and in Pleospora herbarum (Pers.) Rab. 

 which have asci whose walls are composed of two layers, the outer layer, during the process 

 of spore liberation, ruptures and contracts at a point about one third of the distance up from 

 the base of the ascus, thus forming a ring. The inner wall in turn ruptures immediately above 

 the ring and the spores are set free at this point. — H . R. Rosen. 



707. Beardslee, H. C. Michigan collections of Myxomycetes. Rept. Michigan Acad. Sci. 

 19 (1917) : 159-162. 1919. A list of Myxomycetes collected in Montmorency County, Michigan, 

 during August of two summers. Physarum diderma Rost. and P. leucopus Link are reported 

 as of special interest because of their rarity. Fifty-five species are reported. — G. H. Coons. 



708. Bengston, Ida A. The proteus group of organisms with special references to aggluti- 

 nation and fermentation reactions to classification. Jour. Infect. Diseases 24: 428^181. 1919. 



709. Bessey, Ernst A. An undescribed species of Ophiodothella on Ficus. Mycologia 

 11: 55-57. PI. 5. 1919. — O. Fid sp. nov. is described as producing a leaf spot on Ficusaurea 

 in Florida. The fungus belongs near the genus Ophiodothella as limited by Theissen and 

 Sydow, differing in the presence of paraphyses and in the possession of a pycinidial stage 

 which is unlike any described for species of this genus. — H. R. Rosen. 



710. Dietel, P. tiber die wirtswechselnden Rostpilze. [Concerning the heteroecious 

 rusts.] Centralbl. Bakt. II, 48: 470-500. 1918. — The author has summarized, without bibli- 

 ographical citations, the heteroecious rusts, so far as they were known up to the beginning 

 of 1917, giving in convenient tabular form the rust, the aecidial and teleutosporic hosts. He 

 thus enumerates 264 species of heteroecious rusts, as against Klebahns 137. In another 

 table, in parallel columns, certain heteroecious species are compared with parallel short-cycled 

 micro- or lepto-forms, which occur on the same aecial host. The author concludes with a 

 theoretical discussion of the origin of heteroecism. — E. W. Olive. 



