CHROMOGENIC FUNGI WHICH DISCOLOR WOOD. 69 



perithecia. The filaments of the mycelium measure 3/* to 

 7/* in diameter. 



COKIDIA. 



The conidia are borne in clusters similar to those of 

 C.pilifera (pi. 4, f . 1, 2). They are unicellular, obovate 

 to elliptical or cylindrical, and measure 3/* to 7/* by 1/* to 

 2/*, averaging 5/* by 1.8/*. They are hyaline and are 

 usually neither guttulate nor granular, but when old may 

 have one or two guttules. 



Perithecia. 



Perithecia are formed on the mycelium (pi. 4, f. 4), as 

 in C . pilifera. The shape is spherical. They are coal 

 black in color, and measure 120/* to 200/* in diameter, with 

 a smooth, beaked ostiolum, measuring .8mm. to 1.2mm. 

 in length by 10/* to 25/* in diameter, surmounted at ma- 

 turity by a row of short, hyaline, spreading bristles, which 

 support the ejected ascospores in a globular mass. The 

 bristles measure about 10/* to 15/* by 2/* (pi. 3, f. 6). The 

 ascospores are hyaline, pointed, elliptical, often slightly 

 curved, and measure 2.5/* to 4/* by 1/* to 1.5/*, averaging 

 3.5/* by 1/* (pi. 4, f. 3). 



This species resembles, in its gross measurements, the 

 description of O. echinella E. & E. It differs, however, 

 in that the perithecia are borne superficially, and are not 

 glandular-pubescent or thickened at the tips. The mature 

 perithecia are not gregarious, although they bear numerous 

 small bodies at their base, under certain conditions. 



Ceratostomella echinella E. & E. 



The last species of Ceratostomella identified and studied 

 before publication was collected by Dr. von Schrenkat Kir- 

 byville, Texas, on the wood of the red beech, Fagus atropu- 

 nicea (Marsh.) Sudworth. This was growing on freshly 

 cut heart and sap-wood, staining the wood either a bluish or 



