CHEOMOGEJsIC FUNGI WIIICII DISCOLOR WOOD. 79 



masses, surrounded by either water or mucilage. They 

 are unicellular, cylindrical in shape, hyaline, and measure 

 6/* to 8/* by 1.8/* to 2.2a, being of different shape 

 and dimensions from the ascospores, and are thus easily 

 distinguished from them under the microscope. The con- 

 idia in mass as they become old have a gray color. 



Perithecia. 



The perithecia are formed by the union of two or more 

 filaments of the mycelium. First, a gray mass of irregular 

 cells appears at the point of union. This rapidly develops 

 into a globular perithecium, from the top of which there is 

 then rapidly thrown out a beaked ostiolum, consisting of 

 parallel filaments. The perithecia are brown to black in 

 color, 90/* to 180/* in diameter, covered with sparse, con- 

 ical spines, 12/* to 16/* long, with a diameter of 6/* at 

 the base. The beaked ostiolum is brown to black through- 

 out its length, striate, and is surmounted by short, rather 

 thick, hyaline bristles, measuring 12/* to 18/* by 2/* 

 (pi. 3, f. 5). "When the perithecia are mature, the asco- 

 spores are ejected in water in long, slimy, gray masses. 

 In nature they are ejected in an irregular gray mass sup- 

 ported by the terminal filaments of the beak. The asciare 

 fugacious, hyaline, oval, and average 20/* by 10/*. The 

 ascospores are hyaline, not guttulate, at least at first, oval, 

 often flattened on one side, measuring 4/* to 5/* by 3/* to 

 4/*. 



This species of Ceratostomdla is so different in color 

 from the other species studied as to suggest that it may be 

 a Ceralostoma. The gray color of the mycelium on media 

 in which the mycelium of other species remains hyaline, 

 the constant tint of gray in mature conidiaand ascospores, 

 and the peculiar moniliform chains of conidiavery distinct- 

 ly set this form apart at least as a very distinct species. 

 But since the color of the spores shows only in mass, it is 



