130 Cincinnati Society of Natural History. 



Order I. LICKACE^. 



Sporangia always sessile, simple and regular or 

 plasmodiocarp, sometimes united into an asthalium. 

 The wall a thin, firm, persistent membrane, often 

 granulose-thickened, usualh' rupturing irregularly. 

 Spores globose, usualh" some shade of umber or 

 olivaceous, rarely violaceous. 



The species of this order are the simplest of the Myxomy- 

 cetes; the sporangium, with a firm, persistent wall contains 

 only the spores. There is no trace of a capillitium, unless a 

 few occasional threads in the wall of Tubulina prefigure such 

 a structure. To the genera of this order is appended the 

 anomalous genus Lycogala, which seems to me better placed 

 here than elsewhere. 



Table of Genera of Liceace.k. 



1. LiCEA. Sporangia simple and regular or plasmodiocarp, 

 gregarious ; hypothallus none. 



2. Tubulina. Sporangia cylindric, or by mutual pressure 

 becoming prismatic, distinct or more or less connate and 

 aethalioid, seated upon a common hypothallus. 



3. Lvcoc.OEA. ^^thalium with a firm membranaceous 

 wall; from the inner surface of the wall proceed numerous 

 slender tubules, which are intermingled with the spores. 



I. LICIC.A, vSchrad. Sporangia sessile, simple and regular 

 or plasmodiocarp, gregarious, close or scattered ; hypothallus 

 none; the wall a thin, firm meml)ranc, sometimes thickened 

 with .scales or granules, breaking up irregularly and falling 

 away or dehiscent in a regular manner. Spores globo.se, 

 variously colored. 



The sporangia are not seated on a common hypothallus; 

 they are, conseciuently, more or less irregularly scattered about 

 on the substratum. 



