226 THE NORTH AMERICAN SLIME-MOULDS 



small, globose sporangium dotted with numerous small roundish 

 nodules projecting plainly above the general surface. The obconic 

 calyculus is always represented in the outline if not in definite struc- 

 ture. 



New England, New York, Pennsylvania, Ohio, Tennessee, Illinois, 

 Missouri, Iowa, Canada; Toronto, — Miss Currie. 



11. Cribraria microCARPA (Schrad.) Persoon. 



Plate XVII., Fig. 4. 



1797. Dictydium microcarpum Schrad., Nov. Gen. PL, p. 13. 



1801. Cribraria microcarpa Schrad., Pers., Syn., p. 190. 



1875. Cribraria microcarpa (Schrad.) Rost., Mon., p. 235. 



1892. Cribraria microcarpa Schrad., Massee, Mon., p. 63. 



1893. Cribraria microcarpa Schrad., Morg., Myx. Mi. Vail., p. 15. 

 1899. Cribraria microcarpa Schrad., Macbr., N. A. S., p. 168. 



1911. Cribraria microcarpa Pers., Lister, Mycetozoa, 2nd ed., p. 183 (?). 



Sporangia loosely gregarious, very small, .2-.3 mm. in diameter, 

 yellow ochraceous, stipitate, nodding; stipe comparatively stout, dark 

 brown or blackish, tapering upward, often twisted at the apex as in 

 D. cancellatum; calyculus none, represented by simple ribs which 

 give off at intervals free or floating branchlets before blending into 

 the common net; net well developed, the meshes large, the nodes 

 small, irregular, though often rounded and prominent, black, con- 

 nected by delicate transparent threads, with free ends few or none; 

 spore-mass yellow, fading to ochraceous ; spores pale, smooth, globose, 

 6-7 II. 



This species resembles at first sight the preceding, and has been 

 often mistaken for it. As a matter of fact, the distinctions are gener- 

 ally very sharp. In the first place, the sporangia, when carefully 

 measured, are seen to be not more than half as great in diameter; 

 the meshes of the net, on the other hand, are much wider, the whole 

 structure more compact. The nodules are like those of tenella, 

 but are much fewer. The stipe is shorter, the cup wanting, and the 

 costae are few and simple. The color suggests C. aurantiaca. The 

 habitat and distribution as C. tenella. 



To anyone who will read the account of the species as given by 

 the English Mon., 2nd ed., p. 183, it is immediately apparent that 



