THE SLIME MOLDS OF OHIO 
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extending from the exterior to the interior walls of the sporangium, 
persistently attached to the former. 
1. P. oblonga (B. & C.) Morgan. Sporangia gregarious, the shape 
of an empty cup, the upper part of the sporangium being depressed so 
that a deep hollow is produced and which is continuous with the hollow 
of the stalk, 0.6mm. in diam., by 0.8mm. in length, greenish yellow, 
stalked, nodding. Sporangium wall membranous containing dense 
deposits of yellow lime granules, dehiscing from the apex into a few stellate 
reflexed lobes, leaving the depressed portion of the wall remaining as a 
long hollow columella. Stalk cylindrical, inclined, furrowed, red brown. 
Capillitium of a few spindle shaped yellow lime knots, connected by 
branching pale yellow threads, which extend from the columella outward 
to the wall. Spores violet brown, smooth, 6 to 8mmm. in diam. 
Common. 
5. CRATERIUM Trentepohl. 
Craterium aureum (Schum.) Rost. Plate 1, Fig. 8, 8a, and 8b. 
Craterium leucocephalum (Pers.) Ditm. Plate 1, Fig. 7 and 7a. 
Craterium minutum (Leers) Fr. Plate 1, Fig. 6. 
Sporangia stalked, cup shaped, covered with a distinct lid, or globular 
and without a distinct lid. The upper part of sporangium wall charged 
with lime, the lower part cartilaginous and persistent as a well deflned 
goblet shaped cup. Capillitium consisting of large lime knots connected 
by hyaline threads, the central lime knots forming more or less of a pseudo¬ 
columella. 
A. Sporangium wall glossy, opening by a distinct lid. 
B. Lime knots large, light colored. 
B. Lime knots numerous, brown. 
A. Sporangium wall mealy, lid less distinct or wanting. 
C. Sporangia white above, brown below, lid evident. 
D. Sporangia ovoid. 
D. Sporangia cylindrical. 
C. Sporangia yellow, lid not evident. 
1. C. minutum 
2. C. concinnum 
3. C. leucocephalum 
4. C. minimum 
5. C. aureum 
1. C. minutum (Leers) Fries. Sporangia gregarious, goblet shaped, 
0.4 to 0.5mm. in diam., smooth, grayish brown, stalked, lid convex, 
sometimes flat or depressed. Sporangium wall double. Stalk brown, 
cylindrical, furrowed. Capillitium of large white lime knots connected by 
slender threads. Spores violet brown, minutely warted, 8 to 9mmm. in 
diam. 
Hocking Co., Summit Co. 
2. C. concinnum Rex. Sporangia scattered, broadly funnel shaped, 
very small, smooth, brown or pinkish, stalked. Lid distinct, convex, light 
colored. Sporangium wall single, cartilaginous. Stalk brown, furrowed, 
short. Columella absent. Capillitium of numerous angular brown lime 
