222 THE NORTH AMERICAN SLIME-MOULDS 



ing sporangia. The capillitial threads are further definitive, and 

 serve to distinguish it from everything else. 



The range is wide, probably coextensive with the forests of 

 the country. Specimens are before us from New England, 

 Canada, Montana, and all intervening regions, and south to the 

 Gulf of Mexico. 



4. OLIGONEMA FULVUM Morgan. 



1893. Oligonema fulvnin Morgan, Jour. Cin. Soc., p. 42. 



Sporangia large, sub-globose, sessile, crowded, more or less 

 irregular; the peridium tawny yellow, very thin and fragile, 

 iridescent ; mass of capillitium and spores tawny yellow, elaters 

 simple or sometimes branched, very short, sometimes with 

 thicker swollen portions, the surface marked with low smooth 

 spirals, in places faint and obsolete, the extremities rounded 

 and obtuse, usually with a minute apiculus ; spores globose, 

 minutely warted, 10-13 p. 



This species may be recognized by its tawny, irregular, more 

 or less crowded sporangia. Under the lens the warted, not 

 reticulate, spores are diagnostic. The elaters are quite con- 

 stantly marked by imperfect spirals. 



Our specimens are from the author of the species, and so far 

 there are none reported from outside Ohio. 



