192 Mycetozoa of North America 



with irregular, dark, granular rays, the margin toothed ; net rather 

 fine-meshed, the connecting threads narrow, the nodes flat and 

 angular, not greatly thickened, densely filled with large, dark 

 granules, making them appear black; free ends abundant, often 

 branched, arising both from nodes and from connecting threads; 

 stipe slender, two or three times the diameter of the sporangium, 

 furrowed, light at the apex, otherwise dark. Spores ochraceous 

 brown in mass, clear violet by transmitted light, globose or some- 

 what angular, minutely warted, and covered with a coarse and 

 often imperfect reticulum of three to five meshes to the hemi- 

 sphere, 8-8.8 n, averaging 8.5 ju. 



Type locality: Oregon. 



Habitat: On dead wood. 



Distribution: Oregon. 



Illustration: Martin, Jour. Wash. Acad. Sc. 22 : 90. figs. 8, 9. 



The above description is based upon the original of Martin & 

 Lovejoy. An examination of the cotype material discloses that 

 the form is practically C. piriformis, except for the spores, and is 

 perhaps only an aberrant form of that species. The spores are 

 not covered with a reticulum. They have faint spines or warts, 

 irregularly arranged in patches or groups, and with intervening 

 smooth areas which do not form a regular pattern. Similar 

 spores are often met in many species of the Mycetozoa, but hitherto 

 had not been reported in the genus Cribraria. Sometimes they 

 appear in certain collections of a species while other specimens 

 have spores without smooth areas. If it should be found that the 

 condition is more general among the species of Cribraria, its value 

 as a specific character would fall. 



5. Cribraria aurantiaca Schrad. Nov. Gen. PI. 5. 1797. 



Cribraria vulgaris Schrad. Nov. Gen. PI. 6. 1797. 



Cribraria vulgaris Schrad. var. aurantiaca (Schrad.) Pers. Syn. Meth. Fung. 

 194. 1801. 



Plasmodium green or slate-gray (Lister). Total height 1 to 

 2 mm. Sporangia gregarious, stalked, globose or sometimes tur- 

 binate, erect or nodding, 0.4 to 0.7 mm. diam. ; spore-mass golden 

 yellow; cup one third the height of the sporangium, pale brown or 

 brown, irregularly and deeply toothed at the margin, often more 

 regular, studded with round plasmodic granules 0.5-1 /i diam., 

 arranged in close lines radiating from the base of the sporangium; 

 nodes of the net flattened, broad, branching, and angular, or 



