The Myxomyci'lcs of the Miauii Valley, Ohio. 135 



purple and blue. vStipe 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. 



Growing on moss and lichens, at Wood's Holl, Massachu- 

 setts. Sporangium 1-1.5 mm. in height, the stipe very short 

 or sometimes apparently wanting. I am indebted to Dr. 

 W. C. Sturgis, of New Haven, Conn., for a specimen of this 

 unique species. 



7. CoMATRiCHA LONGA, Peck. Sporangia Very sleudcr and 

 much elongated, tapering gradually upward, weak and pros- 

 trate or pendulous, growing close together on a well-developed 

 purplish-black hypothallus. Stipe and columella capillary, 

 smooth and black, reaching to the apex of the sporangium or 

 often vanishing in the network far below it, the stipe very 

 short, the columella long and flexible. Capillitium of long, 

 slender, dark-brown threads; these are reticulately connected 

 near the base, forming a network of large irregular meshes 

 in a series along the columella ; outwardly they are termi- 

 nated by verj' long free branchlets, which vary from simple 

 to two or three times forked or branched. Spores globose, 

 minutely warted, dark brown, 8-10 mic. in diameter. See 

 Plate XI, Fig. 31. 



Growing on old wood and bark of Elm, Willow, etc., in 

 Autumn. Sporangium wuth the stipe 15-40 mm. in length, 

 the stipe 3-8 mm. long, the sporangium .25-.40 mm. in thick- 

 ness. This is the most characteristic species of the genus, 

 being farthest removed from Stemonitis. 



8. CoMATRiCHA FLACCiDA, Lister. Sporangia growing 

 closely crowded together and more or less confluent, on a 

 purplish-brown hypothallus, the walls fugacious. Columellas 

 rising simply from the common hypothallus, or sometimes 

 grown together below and then apparently branching, run- 

 ning through to the apex, and there often confluent with each 

 other, or joined together by portions of membrane. Capil- 

 litium of slender brown threads, which branch and anasto- 



