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Cincinnati Society of Natural History. 



closely adherent layer of minute granules, over which are 

 scattered rather large, roundish or irregular white scales of 

 lime, splitting from the apex downward into a few irregular 

 segments. Stipe short, thick at the base and tapering 

 upward, longitudinally rugulose, from gray to brown or 

 blackish, especially below. Capillitium a loose irregular net- 

 work of tubules, widely expanded at the angles ; the nodules 

 of lime white, numerous, large, irregular, with pointed angles 

 and lobes. Spores globose, very minutely warted, violaceous, 

 8-9 mic. in diameter. 



Growing on old wood, mosses, etc. Sporangium .4-. 5 mm. 

 in diameter, the stipe about the same length or a little longer. 

 The species superficially resembles the gray form of Phy- 

 sarum nutans, and quite likely is constantly overlooked on 

 this account. Although I am not able to verify my reference, 

 yet my specimens answer so well to the description of 

 Raciborski that I am unwilling to invent a new name. 



16. Physarum ornatum Peck. Sporangium globose or 

 depressed-globose, stipitate ; the wall a thin yellowish mem- 

 brane, covered with minute granules and small irregular 

 scales of lime, yellow to orange in color. Stipe short, erect, 

 blackish-brown, black at the base, longitudinally plicate, 

 rising from a small hypothallus. Capillitium of tubules 

 forming a rather dense net-work, with wide expansions at 

 the angles; the nodules of lime large, numerous, yellow, 

 irregular, sometimes confluently branched and reticulate. 

 Spores globose, minutely warted, dark violaceous, 10-12 mic. 

 in diameter. 



Growing on old wood, bark, mosses, etc. Sporangium 

 about .5 mm. in diameter, the stipe about the same length or 

 shorter. Physarum oblatum McBride, can not be distin- 

 guished from this. Specimens of this species in the herbar- 

 ium of Schweinitz are labeled Physarum sulphur eum ; this is 

 without doubt a mistake. 



17. Physarum gravidum Morgan, n. sp. Sporangium 

 depressed-globose, the base umbilicate, stipitate ; the wall a 

 thin, violaceous membrane, brownish at the base, with a thin 

 coat of small, white scales and minute granules of lime. Stipe 

 long, erect, brown or reddish-brown, darker below, tapering 



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