88 



Mycologia 



like a delicate gray cobweb on which the tubes appear in patches 

 and then become continuous, when the mycelium and context 

 practically disappear; hymenium ash-colored, unchanging, very 

 even, regular, not glistening; tubes very short, rounded to an- 

 gular, entire, rather thick-walled at first, 7-8 to a mm.; spores 

 hyaline. 



Type collected on both the upper and lower surfaces on an old 

 specimen of Gano derma in Castleton Gardens, Jamaica, Decem- 

 ber 14, 1908, W . A. & Edna L. Murrill 63. This species forms a 

 very striking contrast with its mahogany-colored host. 



19. Poria subavellanea sp. nov. 



Effused in rather thin patches 3-5 cm. or more long on the 

 underside of corticated or decorticated pine logs ; margin con- 

 spicuous, pure-white, unchanging, cottony, thin, sometimes ele- 

 vated, with a tendency to separate from the substratum; context 

 thin, white, hardly apparent in age; hymenium uneven, continu- 

 ous, glistening, pale-avellaneous ; tubes firm, thin-walled, entire, 

 angular, 1-2 mm. long, 4 to a mm. ; spores very scanty, ovoid, 

 smooth, hyaline, about 4 jx long. 



Type collected on pine bark at Auburn, Alabama, November 

 20, 1897, F. S. Earle 121. Also collected on a decorticated log of 

 Pinus echinata near Womble, Arkansas, November 6, 191 5, W. 

 H. Long 19811. This species might be a resupinate form of 

 some undescribed species of Coriolus. 



20. Poria subcorticola sp. nov. 



Effused for several centimeters, thin, inseparable, continuous ; 

 margin conspicuous, rather thick, persistent, white to cream- 

 colored ; context similar to the margin, persistent, apparent as a 

 paper-thin membrane; hymenium even, white to cream-colored, 

 not glistening, appearing in patches and finally becoming con- 

 tinuous; tubes mostly primordial, very shallow, angular, rather 

 thick-walled, entire, 4-5 to a mm. ; spores hyaline. 



Type collected on much-decayed decorticated wood at Cuer- 

 navaca, Mexico, December 24-27, 1909, W. A. & Edna L. Murrill 

 363. Also collected on the underside of an old fruit-body of 

 Coriolopsis fulvocinerea at Colima, Mexico, January 3-4, 1910, 

 W. A. & Edna L. Murrill 584. The hymenium resembles that of 

 Poria corticola. 



