262 Journal of Mycology [Vol. 13 



commune Rab. ; Sclerotium antarcticum Bomm. et Rouss. ; Scle- 

 rotium (Myxomycetis?) 



Orton, W. A. 



The annual summary of "Plant Diseases in 1906" occupies 

 eight closely printed pages in the Yearbook of the U. S. Depart- 

 ment of Agriculture for 1906. 



Sheldon, John L. 



In a short article relative to "The Taxonomy of a Leaf 

 -Spot Fungus of the Apple and other Fruit Trees," it is 

 pointed out that the spores are not hyaline, not slightly 

 smoky but considerably smoky, even approaching olive- 

 brown. Hence, Phyllosticta pirina Sacc. is transferred to the 

 genus Coniothyrium — C. pirina (Sacc.) Sheldon n. n. See 

 Torreya, July, 1907. 



Overton, James Bertram. 



This excellent piece of work — "The Morphology of the 

 Ascocarp and Spore-formation in the many-spored Asci of The- 

 cotheus pelletieri" — published in the Botanical Gazette, Decem- 

 ber 1906, could not be adequately sketched in a single paragraph 

 even of considerable length. Copious literature is cited and dis- 

 cussed, then the work on Thecotheus, a Discomycete (Ascobo- 

 laceae) is outlined, and illustrated by two lithographic plates. 

 This fungus has a fruit-body formed from several ascogonia 

 (being a compound apothecium). The asci arise, says the au- 

 thor, from the subterminal cells of the recurved tips of the asco- 

 genous hyphae which cells are binucleate ; and the ascus nucleus 

 is formed by the fusion of these two primary ascus nuclei. The 

 ascus nucleus divides by triple division — and finally 32 free 

 nuclei are formed in the ascus. Spore delimitation follows the 

 process described by Harper; each spore is uninucleate. 



Durand, Elias J. 



Dr. Durand gives a brief account in the Journal of Mycol- 

 ology, July 1907, of "The Mycological Writings of Theodor 

 Holmskjold and their relation to Persoon's Commentatio." 

 His points are that Holmskjold's text has appeared in four forms : 

 (i) as a privately distributed folio volume with plates, 1790; (2) 

 as a contribution to Usteri's Annalen without plates, 1795; (3) 

 as a volume edited by Persoon without plates, 1797; (4) as a 

 volume of "Beata ruris, Fungis danicis a Theodoro Holmskjold 

 impensa", with plates, 1799. Persoon's Commentatio appeared 

 first in his edition of Holmskjold, 1797, and in the same year as 

 a reprint from the last with a modified title and slightly modified 

 text. 



