42 



Cincinnati Society of Natural History. 



PYRENOMYXA, Gen. Nov. 



Stroma superficial, pulvinate, the substance black and 

 carbonaceous, composed mostly of large confluent cells (perithecia ?) 

 with thin fragile walls, their large mouths covered by a 



uniform continuous layer. Asci . Sporidia navicular, brown, 



continuous, produced in spherical or oval clusters of 8, lying 

 edge to edge. 



I can furnish no theory for the production of the spores other 

 than that they are formed in asci ; and if this be true, it appears to 

 me the genus will be most nearly related to the genera Bolinia 

 and Ustulina of the Pyrenomycetes. I have waited several years to 

 find the younger stage of the fungus but it has not appeared and it is 

 hoped this publication may enable others to find it. 



15. Pyrenomyxa invocans. — Stroma pulvinate, more or less 

 elongated and irregular, internally black, the outer surface ochrace- 

 ous. Cells (Perithecia?) very large, oblong, in two or three irregular 

 layers, to some extent confluent, crowded and compressed, their walls 

 thin and fragile; the wide mouths with crenulate margins, closed by 

 a thin fragile common crust. Sporidia brown, navicular, thin 

 12-15x4-6 mic. 



Growing on hard wood of hickory. Preston, Ohio. Stroma 

 2 or 3 to several centimeters in extent and about 5 mm. in thickness. 

 I first found this singular fungus about twelve years ago. The first 

 specimens lay around a long time and were finally thrown away as 

 something abnormal and worthless. Three or four years ago I found 

 it again and in a locality distant many miles from the first place. 

 Portions of the second collection have been distributed to several 

 mycologists. It has been suggested that the organism belongs to the 

 Myxomycetes and in fact the stroma with its large cells greatly 

 resembles the aethalioid form of Tubulina cyli?idrica, Bull. 



16. Mitrula roseola. — Ascoma capitate, stipitate ; the head 

 globose or obovoid, continuous with the stipe, pale pinkish, internally 

 stuffed with white fibers; stipe short, thick, erect, solid, white. Asci 

 elongated-clavate, 60-80x7-8 mic. with a short stalk ; paraphyses fili- 

 form. Sporidia subdistichous, clavate-cylindric, hyaline, continuous, 

 20-25x2.5 mic. 



Growing on sandy soil, Columbia, S. C. Prof. George F> 



