The Myxomycetes of the Miami Valley, Ohio. 



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pyriforme, and C. niinutum of Rostafinski's monograph all in 

 one species. 



2. Cratkrium concinnum Rex. Sporangium usually 

 minute, broadly funnel-shaped, stipitate ; operculum always 

 more or less convex, rarely approaching a hemispherical 

 shape, dehiscent in a regular circumscissile manner. The wall 

 a thick, brownish membrane, externally smooth and variously 

 colored, sometimes uniformly light or dark umber, sometimes 

 dark brown below and brownish white above ; the operculum 

 brownish white, darkest in the center. Stipe short, dark 

 brown, longitudinally ridged. Capillitium of tubules form- 

 ing a close-meshed net-work, bearing small rounded or slightly 

 angular nodules of lime, ochre-brown in color. Spores 

 globose, very minutely warted, brown, 9-10 mic. in diameter. 



Growing usually upon chestnut-burs, and frequently asso- 

 ciated with Lachnobulus globosus. Sporangium -5-.8 mm. in 

 height including the stipe and .2-. 5 mm. in diameter at the 

 top, the stipe equaling the sporangium in length. It is readily 

 distinguished by its small nodules in the capillitium, which 

 are invariably of a dull, brownish-ochre color. 



3. Cratkrium rubesckns Rex. Sporangium subcylin- 

 dric or elongated cyathiform, stipitate; the apex convex, at 

 maturity separating by an irregular line in a circumcissile 

 manner. The wall dark violet-red, smooth, except at the 

 upper portion, which is slightly roughened by an external 

 deposit of scattered lime-granules of a pale, lilac color. Stipe 

 short, violet-black, wrinkled longitudinally. Capillitium of 

 tubules forming a loose, irregular net work, bearing large, 

 violet-red nodules of lime which are often confluent in the 

 axis of the sporangium. Spores globose, minutely warted, 

 dark violaceous, 7-9 mic. in diameter. 



Growing on old wood, leaves, etc. Sporangium .6-. 8 mm. 

 in height including the stipe and .5-6 mm. in diameter, the 

 stipe one-half the height of the sporangium. The species is 

 distinguished by the color, which exhibits some shade of red 

 or violet-red in every part of its structure. 



4. Cratkrium minimum B. & C. Sporangium cylindric 

 or turbinate cylindric, stipitate ; the apex convex, separating 

 in a regular circumcissile manner by a lid. The wall a thick, 



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