1 6 CincitiJiati Society of Natural History. 



2. Ophiotheca Wrightii, B. & C. Plasmodiocarp more 

 or less elongated, bent and flexuous, very commonly in small 

 rings, from brownish-ochre to brown or blackish in color, not 

 polished ; the wall a thin yellow membrane, with a thin brown 

 outer layer, irregularly dehiscent. Capillitium of slender 

 loosely-branched threads, 2-3 mic. in thickness, furnished 

 with numerous straight or bent long-pointed spinules. Spores 

 subglobose, yellow, minutely warted, 10-12 mic. in diameter. 

 See Plate I, Fig. 14. 



Growing on the inside of bark of Acer, Carya, etc. Plas- 

 modiocarp about .5 mm. in thickness, variable in length, often 

 in small rings 1-2 mm. in diameter. The prickly threads are 

 quite characteristic; the spinules are 3-5 mic. in length. 

 Hemiarcyria melanopeziza, Speg., is evidently the same thing. 



3. Ophiotheca vermicularis, vSchw. Plasmodiocarp 

 terete and more or less elongated, bent and flexuous, some- 

 times annular or reticulate, the .surface not poli.shed, brownish 

 in color; the wall a thin yellow membrane, covered on the 

 outside by a more or less thickened brown layer of scales and 

 granules, irregularly dehiscent. Capillitium of slender loosely 

 branched threads, 2-3 mic. in thickness, the surface with 

 minute warts and ridges. Spores subglobose, yellow, 10-12 

 mic. in diameter. 



Growing on the inside of old bark. Plasmodiocarp abouf 

 .4 mm. in thickness and various in length ; in my specimens 

 the sporangia are mostly small rings. The species looks 

 exactly like Ophiotheca Wrii^htii, but the character of the 

 threads is quite different. 



4. Ophiotheca pallida, B. & C. Plasmodiocarp terete, 

 oblong or elongated annular and flexuous, the surface dull, 

 pale ochraceous; the wall a thin pellucid membrane, minutely 

 granulate, with a thin pale ochraceous outer layer, irregularly 

 dehiscent. Capillitium of slender loo.sely-branched threads, 

 2-3 mic. in thickness, the surface minutely warted or spinu- 

 lo.se. vSpores subglobo.se, pale yellow, 10-12 mic. in diameter. 



Growing on dead stems of herbaceous plants. Plasmodio- 

 carp .3-. 4 mm. in thickness, variable in length, .sometimes 

 short and roundish or oblong, sometimes much elongated and 

 flexuous. More delicate than Ophiotheca verniicu/aris, and 

 distinguished by its pallid color throughout. 



