* 



THE JOURNAL 



- OF THE - 



Cincinnati Society of Natural History. 



Voi, XIX. Cincinnati, Ohio, August, 1896. No. 1. 



ARTICLE I. — THE MYXOMYCETES OF THE MIAMI 

 VALLEY, OHIO. 



By A. P. Morgan. 



Fourth Paper. 



(Read May 6, 1896.) 



Order VIII. PHYSARACE^E. 



Sporangia simple and stipitate or sessile, some- 

 times plasmodiocarp, rarely combined into an aetha- 

 lium; the wall a thin membrane, nsnally with an 

 outer layer of minute roundish granules of lime. 

 Stipe present or often wanting, seldom prolonged 

 within the sporangium as a columella. Capillitium 

 consisting of slender tubules, which branch repeat- 

 edly in every direction and anastomose to form an 

 intricate network, the extremities attached on all 

 sides to the wall of the sporangium ; the tubules 

 more or less expanded at the angles of the network 

 and inclosing minute roundish granules of lime, 

 these granules either aggregated into nodules with 

 intervening empty spaces or more rarely distributed 

 throughout their entire length. Spores globose, 

 very rarely ellipsoidal, violaceous. 



This order is at once distinguished from the Didymiaeese 

 by the presence of the granules of lime in the capillitium. 



Printed August 23, 1896. I 



