i8 Cincinnati Society of Natural History. 



This genus differs from Arcyria in the capillitiuni springing 

 from numerous points of the sporangial wall. 



1. Lachnobolus globosus, Schw. Sporangia globose, 

 stipitate, pale yellow, changing to clay-color; the wall thin 

 and delicate, pellucid, minutely granulose, the upper part 

 torn away and soon disappearing, the lower half more per- 

 sistent. Stipe short, tapering upward, expanding at the ba.se 

 into a small hypothallus. Capillitiuni arising from the lower 

 portion of the sporangium, forming a complicated network, 

 the threads 3-5 mic. in thickness, the .surface closely covered 

 with minute warts. Spores globose, pale yellow to clay-color 

 in mass, 8-9 mic. in diameter. See Plate I, Fig. 15. 



Growing on the spines of Chestnut burs. vSporangia .5-. 6 

 mm. in diameter, the stipe shorter than the sporangium. 



2. Lachnobolus incarnatus, A. & S. Sporangia globose 

 or ellipsoidal, substipitate, clo.sely crowded and seated on a 

 common hypothallus; the wall thin and delicate, pellucid, 

 minutely granulose, dehiscing irregularly. Stipe very short 

 or often obsolete. Capillitiuni proceeding from the inner sur- 

 face of the sporangial wall, forming a com-plicated network, 

 the threads extremely variable in thickness, minutely warted 

 and spinulose. Spores globose, flesh-color in the mass, 8-9 

 mic. in diameter. 



Growing on old wood. vSporangia .5-.8 mm. in height, 

 sessile on a narrow base or with a very short stipe; the 

 threads of the capillitiuni are generallj^ 3-5 mic. in thickness, 

 but there are broader expansions at the nodes and elsewhere. 

 My specimens are from Prof McBride, of Iowa. The species 

 is extremely variable, and these .specimens differ much from 

 those described elsewhere. 



II. ARCYRIA, Hill. Sporangia regular ovoid tocylindric, 

 stiptiate; the wall a thin delicate membrane, circumsci.ssile or 

 torn away near the base, the upper portion evanescent, the 

 lower part persistent, small and cup-shaped. Stipe more of 

 less elongated, the interior containing roundish vesicles which 

 become .smaller upward, and gradually pass into the normal 

 spores. Capillitiuni of slender tubules, issuing from the 

 interior of the stipe, forming a complicated network, without 



