The 3fyxo>nyii'/es of thr Miami \'allc\\ Ohio. 133 



mill, in height. Pla.siiiodium white, the ininiature .sporangia 

 dull-gray tinged with .sienna color. The columella, with its 

 radiating bits of membrane, i.s the .same substance as the wall; 

 it may be a reentrant edge of the prismatic sporangium, 

 caused by excessive crowding together ; at least, this may be 

 regarded as its origin; there may have ari.sen some further 

 adaptation. The species is Siphoptychiinn Casparyi, Rost. I 

 am indebted to Dr. George A. Rex for the specimens I have 

 examined. 



3. TuBULiN.v C.KSPITOSA, Peck. Sporangia short-cyliiidric, 

 clo.sely crowded, distinct or connate, argillaceous olive to olive- 

 brown in color, seated on a well-developed hypothallus ; the 

 wall a thin membrane, with a dense la3'er of minute dark- 

 colored round granules on the inner surface. Spores argilla- 

 ceous olive in the mass, globose, minutely warted, 6-8 mic. in 

 diameter. 



Growing on old wood. >'Ethalium in irregular patches 

 sometimes several centimeters in extent, the single sporangia 

 about I mm. in height. Plasmodium dark olivaceous, the 

 sporangia blackish if dried when immature, taking a paler 

 shade of olivaceous, according to development and maturity. 

 This is Perichcena caspitosa. Peck, in the 31st N. Y. Report. 



III. LVCOGALA. Mich. .-Ethalium with a firm membra- 

 naceous wall ; from the inner surface of the wall proceed num- 

 erous slender tubules, which are intermingled with the spores. 

 The material of the wall appears under three different forms : 

 the inner layer is a thin membrane, uniform in structure, of a 

 yellow-brown color, and semi-pellucid ; the outer layer consists 

 of large flat roundish or irregular vesicles, brown in color, 

 filled wath minute granules, and arranged in one or more 

 strata; from these vesicles originate the tubules, which trav- 

 erse the wall for a certain distance, and then enter the interior 

 among the spores ; the tubules are more or less compressed, 

 simple or branched, and the surface is ornamented with warts 

 and ridges, which sometimes form irregular rings and reticu- 

 lations. 



If the sporophores in this genus be regarded as simple 

 sporangia, which is the view that Rostafinski takes of one of 



