1919] 



BURT THELEPHORACEAE OF NORTH AMERICA. XI 261 



that my correspondents have roughly classified their collections 

 of this species as a Hydnum and withheld specimens of it. 



Specimens examined: 

 Cuba: C. Wright, 264 (in Curtis Herb.). 



In working over the species of Aleurodiscus which have been 

 described, I found that the Aleurodiscus tabacinus Cooke should 

 be transferred to Veluticeps. Although the species is extra 

 limital and not likely to be found in North America, I now 

 make this transfer and add the following notes on structure : 



Veluticeps tabacina (Cooke) Burt, n. comb. 



A leurodiscus tabacinus Cooke, Grevillea 14: 11. 1885; Handb. 

 Australian Fungi, 193. 1892. Corticium tabacinum (Cooke) 

 Sacc. Syll. Fung. 6: 607. 1888. 



Fructifications pileate, hemispherical or cup-shaped, sessile, 

 apparently attached by the vertex, drying nearly black; in 

 structure 800 n thick, with a nearly black, crust-like zone on the 

 upper side, from which a broad layer of hyaline hyphae extends 

 to the hymenium and is traversed by brown hyphal fascicles; 

 hymenium drying Verona brown, not covering the protruding 

 fascicles; fascicles about 6 to a mm., 50-60 n in diameter, up to 

 900 n long, protruding up to 100 m beyond the hymenium, com- 

 posed of flexuous, colored hyphae 3 n in diameter; basidia simple, 

 100X9-10 ;u, bearing the spores on 4 slender sterigmata; spores 

 hyaline, even, flattened on one side, 16X6 /z- 



Fructifications 2-3 mm. in diameter, 1-1 J mm. thick. 



On wood. New South Wales. 



V. tabacina is distinct from V. Berkeleyi by attachment of its 

 pileus by the center, and by its hyaline substance and sub- 

 hymenial tissue; when a fertile specimen of V. Berkeleyi is 

 available, a difference in spores may perhaps be found. 



Specimens examined: 

 Australia: New South Wales, comm. by G. Massee (in N. Y. 

 Bot. Gard. Herb.). 



MYCOBONIA 



Mycobonia Patouillard, Myc. Soc. Fr. Bui. 10: 76. 1894 

 (with diagnosis under Bonia Patouillard, Myc. Soc. Fr. Bui. 8: 



