Notes and Brief Articles 



289 



being illustrated by halftones of the hymenophores and figure? 

 in the text showing the character of the setae. According to the 

 author, in the simplest condition of the fructification in this genus, 

 only a setigerous layer is present ; in the next degree higher of 

 development, a hyphal layer connects the setigerous layer with 

 the substratum or may be extended from the substratum as the 

 upper surface of the pileus ; while in a still more highly de- 

 veloped condition, the hyphal layer, is differentiated into an in- 

 termediate layer and a denser and dark zone, and usually into a 

 second hyphal layer adnate to the substratum or forming the 

 surface of the pileus. In addition to the distinctive morpho- 

 logical character of elongated, conical setae in the hymenium, 

 there is also a chemical substance in the tissue of all the species 

 of Hymenochaete studied, that causes an immediate darkening 

 of sections when dilute potassium hydrate is brought in contact 

 with them. Hymenochaete is a genus of tropical species rather 

 than of the cooler portion of the north temperate zone ; for, in 

 contrast with the 29 species occurring from the Gulf States to 

 Brazil, only 13 species are known north of the latitude of Vir- 

 ginia, and from Europe perhaps 9 species, of which 6 are well 

 known. 



The following species are described as new : H. borealis Burt 

 sp. nov., on dead f rondose wood from Ontario to New Jersey ; 

 H. reflexa Burt sp. nov., on dead wood in Jamaica; H. cubensis 

 Burt sp. nov., on dead wood in Cuba and Porto Rico ; H. un- 

 gulata Burt sp. nov., on dead wood in Mexico ; H. digitata Burt 

 sp. nov., on dead logs in Panama ; H. fulva Burt sp. nov., on 

 fallen branches in Louisiana and Jamaica ; H. pinnatifida Burt sp. 

 nov., on fallen branches from Georgia to Louisiana and in 

 Mexico, Cuba, and Jamaica ; H. multisetac Burt sp. nov., on fallen 

 branches in Cuba and Jamaica ; H. anomala Burt sp. nov., on 

 fallen branches in Cuba; and H. opaca Burt sp. nov., on dead 

 branches in Jamaica. 



Onygena equina (Willd.) Pers. 



On May 1, 1920, I collected excellent specimens of Onygena 

 equina (Willd.) Pers. on cow's horns and on part of a cow's hoof 



