1 66 THE NORTH AMERICAN SLIME-MOULDS 



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7. CRIBRARIA INTRICATA (Schrad.) Rost. 



1797. Cribraria intricata Schrad., Nov. Gen. PI., p. 7. 



Sporangia gregarious, globose, large, .7-1 mm. in diameter, 

 nut brown or olivaceous, erect, stipitate ; stipe long, slender, 

 purplish brown, flexuous ; calyculus variable, sometimes occupy- 

 ing one-third of the sphere, when it is delicately costate, con- 

 colorous with the stipe, and passes over to the net by a distinctly 

 toothed or serrulate margin, sometimes represented by irregular 

 ribs or costas only ; net well differentiated, the threads delicate, 

 transparent, yellow, connecting large black nodules, often run- 

 ning from one to the other in pairs or sometimes three together, 

 free ends not numerous, the meshes few-sided, often triangular ; 

 spores in mass, dull olivaceous, under the lens pallid, nearly 

 smooth, 6-7 fM. 



A very rare species, if indeed it occur in this country. At 

 least the form figured by Rostafinski, Tab. II., Fig. 27, and 

 Massee, PL I, Fig. 1 1, has not come to our notice. The parallel- 

 ism of the net threads is a touch added by Rostafinski ; Schrader 

 does not mention it. Lister makes this species include the pre- 

 ceding. The form described in Bull. Lab. Nat. Hist. la., II., 

 p. 119, is C. dictydioides. 



Reported from New England, New York, and Pennsylvania. 



8. CRIBRARIA PIRIFORMIS Schrader. 



PLATE XVII. , Fig. 9. 

 1797. Cribraria piriformis Schrad., Nov. Gen. PL, p. 4. 



Sporangia gregarious, small, .3-. 5 mm., turbinate or globose, 

 erect, purplish brown, stipitate ; stipe comparatively short, taper- 

 ing upward, longitudinally furrowed, purple or brown ; calyculus 

 very well defined, about one-third the sporangium, not ribbed, 

 flattened or even umbilicate below, the margin plainly denticu- 

 late, dusky brown ; the net simple, the meshes large, triangular, 

 with few free ends ; the nodules small, nearly globular, convex ; 

 spore-mass dull, yellowish brown ; spores by transmitted light 

 pale ochraceous or salmon-tinted, nearly smooth, 5-6.5 V*. 



