24 Cincinnati Society of Natural History. 



olive-yellow to olive-brown in color ; the spiral ridges five or 

 six, close, smooth. vSpores in mass, lemon-yellow, globose, 

 very minutely warted, S-g mic. in diameter. See Plate I, 

 Fig. 19. 



Growing gregariously on old damp logs ; very common in 

 this region. Sporangium with the stipe 2-3 mm. in height, 

 the stipe usually much longer than the sporangium ; the 

 capillitium expands considerably after the disappearance of 

 the upper part of the sporangium. This species is an Arcyria 

 in every respect, except the spiral ridges, which wind about 

 the thread of the capillitium. 



2. Hemiarcvri.v Varnevi, Rex. Sporangium elongated 

 ovoid, pale yellow, stipitate ; the upper part of the wall dis- 

 appearing at maturity, leaving a small cup-shaped persistent 

 base. Stipe very short, dull brown. Capillitium of very 

 slender threads 3.2-3.5 mic. in thickness, dull ochre in color, 

 forming a network of small meshes, with numerous short 

 slightly clavate free extremities, which proceed from the 

 peripheral meshes ; the spiral ridges seven or eight, winding 

 unevenly, those of the superficial threads minutely spinulose. 

 Spores in mass pale yellow, globose, even, 6-7 mic. in diameter. 



Growing on old wood ; Kan.sas, May \'arney. Sporangium 

 with the stipe about i mm. in height, the stipe very short. 

 Dr. Rex, in Proceedings of the Academy of Natural vSciences, 

 Philadelphia, 1891. 



3. Hemiarcvria ablata, Morgan n. sp. Sporangium 

 obovoid to turbinate, yellow or olive-yellow, stipitate ; the 

 wall rather firm, smooth and shining, breaking away about 

 the apex, leaving the greater portion persistent. Stipe short, 

 erect, yellow-brown to blackish in color, arising from a thin 

 hypothallus. Capillitium of threads, 5-7 mic. in thickness, 

 yellowish-ochre in color, more or less branched ; the free 

 extremities very scarce, obtuse or slightly swollen ; the spiral 

 ridges four or five, close, smooth or very minutely warted. 

 vSpores in mass, yellow, globose, minutely warted, S-q mic. in 

 diameter. 



Growing on old wood of Elm, etc. Sporangium with the 

 stipe 1.5-2 5 mm. in height, the stipe variable in length, but 

 not longer than the sporangium, diameter of the sporangium 



