200 Mycetozoa of North America 



of which are hardly expanded ; plasmodic granules about 1 n diam. 

 Stalk firm and erect, dark brown, 0.5 to 1 mm. high. Spores 

 reddish in mass, paler by transmitted light, minutely warted, 

 5-7 ij. diam. 



Type locality: Switzerland. 



Habitat: On dead coniferous wood. 



Distribution: *New Mexico, *Oregon. 



Illustration: Lister, Mycetozoa ed. 3. pi. 219, figs. a-d. 



A handsome species rare in North America. It is one of two 

 species known with a reddish color. The other, C. rubiginosa 

 Fries, so far unknown from North America, has a much deeper 

 calyculus, a short stout stalk, and a closer net. 



15. Cribraria purpurea Schrad. Nov. Gen. PI. 8. 1797. 



Plasmodium scarlet? (Macbride). Total height 2 to 2.5 mm. 

 Sporangia crowded or gregarious, erect or inclined, globose, about 

 1 mm. diam., reddish purple; cup about one third the height of 

 the sporangium, deeply toothed at the margin; net irregular, with 

 meshes of varying sizes; nodes flattened, expanded, angular, 

 branching and irregular; plasmodic granules large, purple, 2-2.5 ^l 

 diam., densely distributed in the cup and nodes. Stalk purplish 

 black, two or three times the height of the sporangium, rugged, 

 furrowed. Spores purplish, faintly warted, 5-7 n diam. 



Type locality: Europe. 



Habitat: On dead wood. 



Distribution: Colorado, Maine, *Massachusetts, *Montana, 

 New York, Ontario, Oregon, Pennsylvania, *South Carolina, 

 Tennessee, *Washington. 



Illustration: Lister, Mycetozoa ed. 3. pi. 146, figs. a-c. 



This species is not common and is confined to higher altitudes 

 in the mountains, where it sometimes forms large colonies. Occa- 

 sional collections are close to C. elegans, having much smaller 

 sporangia on long stalks, but the characteristic loose, irregularly 

 meshed net of C. purpurea. 



16. Cribraria elegans Berk. & Curt.; Berk. Grevillea 2: 67. 

 1873. (N. Y. B. G. no. 12923, type material.) 



Plasmodium? Total height 0.7 to 1.7 mm. Sporangia gre- 

 garious, stalked, erect or inclined, globose, 0.3 to 0.5 mm. diam., 

 reddish purple; cup about half the height of the sporangium, the 



