4. COMATRICHA ELLISII, Morgan, n. sp. Sporangia short, erect, oval or ovoid to oblong. Stipe and columella erect, brown and smooth, rising from a thin pallid hypothallus, tapering upward and vanishing into the capillitium toward the apex of the sporangium, the stipe usually longer than the columella. Capillitium of slender pale brown threads; these branch several times with lateral anastomosing branchlets, forming a rather open network of small meshes, ending with very short free extremities. Spores globose, even, pale ochraceous, 6-7 mic. in diameter. See Plate XI, Fig. 29. Growing on old pine wood. Sporangium .3-.6 mm. in height by .3-.5 mm. in width, the stipe usually a little longer than the sporangium. This elegant little species I have from Mr. J. B. Ellis, of Newfield, N. J. It is said to be mingled in some of the specimens with _Lamproderma Ellisiana_, Cke. §2. LARVELLA. Threads of the capillitium branching a few times and anastomosing to form a network of large meshes, attaining the wall by numerous long, free extremities. 5. COMATRICHA CRYPTA, Schw. Sporangia cylindric, bent or flexuous and more or less inclined, growing close together on a conspicuous purplish-brown hypothallus. Stipe and columella smooth and black, tapering upward and reaching the apex of the sporangium, the columella bent and flexuous or spirally twisted, about as long as the stipe. Capillitium composed of irregular, bent and uneven threads, which are brown below, becoming colorless outwardly; the threads branch a few times, forming a network of large irregular meshes, sometimes much defective; the free extremities irregular and unequal, simple or branched. Spores globose, brown, minutely warted, 7-9 mic. in diameter. See Plate XI, Fig. 30. Growing out of fissures of the bark and wood of Hickory, Acer, etc. Sporangium with the stipe 4-7 mm. in height, the stipe a little shorter, or sometimes much longer than the sporangium, the latter .25-.30 mm. in thickness. The exterior colorless portion of the capillitium is exceedingly delicate, easily breaking away and leaving the capillitium quite irregular and defective. _Stemonitis crypta_, Schweinitz's N. A. Fungi, 2351. _Comatricha irregularis_, Rex, is the same thing. 6. COMATRICHA CÆSPITOSA, Sturgis. Sporangia short, clavate, densely crowded or cæspitose upon a delicate hypothallus; the wall subpersistent, silvery, shining with tints of purple and blue. Stipe very short or nearly obsolete, the columella rising to two-thirds or three-fourths the height of the sporangium. Capillitium of slender dark-brown threads, which branch and anastomose quite irregularly, forming a network of intermingled large and small meshes, ending in long, tapering, free extremities. Spores globose, minutely spinulose, dark violaceous, 10-12 mic. in diameter.