140 Natural History Bulletin. 



if not quite, to the apex of the sporangium. Capillitium very 

 loose, the branches only two or three times dichotomous. 

 Spores brown, rough, with irregularly scattered papillae, about 

 .009. October — November. 



This species differs even to the naked eye from both the 

 preceding. The sporangia are more closely placed and have a 

 singularly ragged chenille-like appearance and are blue-black 

 in color. The spores are very large for this genus and dis- 

 tinctly papillose under moderate magnification. The capillitium 

 is also much more lax, its ultimate divisions much as in the 

 next. Identified by comparison with specimens furnished by 

 Prof. A. P. Morgan. 



37. CoMATRiCHA LONGA, Pcck. Plate VI, Figs. 2, 2a and ib. 



Sporangia cylindrical, long and slender, on a distinct hypo- 

 thallus, crowded, dull black in mass. Stipe delicate, black 

 and shining, one-sixth to one-fourth the entire length of the 

 fruit, extending as columella to the obtuse apex of the 

 sporangium. Capillitial threads branching very lax and open^ 

 the branches comparatively short, rigid. Spores rough, 

 warted, .009. September. 



A very remarkable and well marked species. The sporan- 

 gia stand nearly a centimeter high, occur in more or less 

 tangled mass and at first suggest a weathered Stemonitis. 

 The open net-work is an exaggeration of the type exhibited 

 in the species last named. Colonies are an inch or less in 

 diameter on bark of fallen trees. Rare. Identified by com- 

 parison with material sent by Dr. Geo. Rex. 



STEMONITIS, Gleditsch, 



Plasmodium at first white, at length heaped in rounded cake- 

 shaped mass which at maturity becomes slowly modified into 

 the crowded but distinct stiptitate sporangia. Stipe continued 

 within the sporangium as in Comatricha to form the columella 



