50 



Cincinnali Society of Na/tii a/ History. 



minutely pulverulent, pale stratum. Hypha? consisting of 

 extremely fine threads, running on and beneath the surface, 

 so that the spores appear to be sessile upon ihe matrix. 

 vSpores hyaline, ellipsoidal, com- 

 posed of 6-8 spires, closely coil- 

 ed; spore 40-48 X 25 mic. ; the 

 thread 5-6 mic. in thickness. 

 (Fig. x{.) 



Growing on old wood of Kim. 

 The spores appear to be sessile 

 immediately upon the wood ; the 

 hyphse are so fine as to be scarcely discernible. 



b. Spores colored. 



3. Helico')n AUK.iTUM, ElHs. Effused, forming a thin, 

 pulverulent, golden-yellow stratum. Hyphae erect, septate, 

 simple or rarely branched, brown below, the apex hyaline, 

 each terminated by a single .spore. Spores golden-yellow, 

 ellipsoidal, composed of 12-15 spires, closely coiled; spore 

 37-44x25 mic; the thread about 3 mic. in thickness. (Fig. 18.) 



iig. I 



I'ig. IN. HlUcoiiii aiiraliiiii. 



Growing on old wood of Acer ruhrimi, Newfield, N. J., Mr. 

 J. B. Ellis. The apex of the erect hyplue at first runs out 

 into a minute hyaline cork-screw ; the coils continue to mul- 

 tiply and come closer together, gradually ac(|uiring their 

 golden-yellow color. 



4. II 1:1,1 C()<iN HiJ.ii'TKTM, Peck. ICffused, forming a 

 thin, velvety olivaceous .stratum, llyphic abundant, creeping, 



