142 ENDOSPORE^E. [CRIBRARIA. 



Plate LIIL, B. a. sporangia after dispersion of spores, x 20 ; b. part of 

 net and cup of sporangium, x 50 (Freiburg, Germany : Rostafinski's type) ; 

 c. net and cup of sporangium, x 50 (Black Forest, Germany) ; d. spore, 

 and plasmodic granules, x 600. 



Specimens from America from low elevations have usually more 

 numerous and delicate connecting threads, and more prominent nodes in 

 the upper part of the net ; they approach forms of C. intricate^ while 

 the European type is coarser and more nearly resembles bold forms 

 of C. aurantiaca. A gathering made by Dr. Rex at an elevation of 

 6,200 feet on Roan Mount, N. Carolina, exactly corresponds with 

 Rostafinski's type in the Strassburg collection.. 



Hal}. On dead fir-wood. Baden Baden (L:B.M.108) ; Germany 

 (Strassb. Herb.) ; Geneva (K. 1679) ; Norway (L:B.M.108 slide) ; 

 New York (L:B.M.108) ; N. Carolina (L:B.M.108). 



Heterodictyon Bieniaszii Racib., in Hedw., xxviii., p. 121 (1889). 

 Sporangia solitary ; stalk T5 to 2'5 mm. high, furrowed, thick below, 

 narrowed upward ; sporangia globose, brown, 0'8 to 1 mm. broad ; 

 cup one- third the height of the sporangium, bright brown, with 

 net-like granular thickenings on the inner side as in C. argillacea ; 

 net dense with thickened nodes 3 to 4 angled, with concave sides, 

 united with one another by thin connecting strands ; the upper edge 

 of the cup toothed, the teeth running into long linear parallel ribs 

 as in Dictydium, which are bound together by thin horizontal threads ; 

 the ribs are 30 to 40 in a sporangium, and lose themselves at 

 the summit in a Cribraria-like net with 3 to 6 angled concave-sided 

 knots and ray-like connecting threads ; spores bright yellow, smooth, 

 5 to 7 mm. diam. 



Hal}. On dead trunks in the Zoological Gardens of Tenczynek, 

 Galicia. 



This description suggests Cribraria macrocarpa. 



6. C. aurantiaca Schrad., Nov. Gen. PL, p. 5 (1797). Plas- 

 modium sap-green. Total height 1 to 2 mm. Sporangia globose, 

 gregarious, stipitate, erect or nodding, 0'4 to 0*7 mm. diam., 

 nut-brown ; cup one -third the height of the sporangium, 

 irregularly and deeply toothed at the margin, beset with round 

 plasmodic granules 0'5 to 1 /x diam., arranged in close lilies 

 radiating from the base of the sporangium ; nodes of the net 

 flattened, broad, or narrow, branching, angular, the angles 

 continued into the delicate connecting threads, and often into 

 a few free rays. Stalk subulate, dark brown, two to four times 

 the height of the sporangium. Spores golden-yellow or ochraceous, 

 smooth, 5 to 6 ^ diam. Rost., Mon., p. 233 ; Cooke, Myx. Brit., 

 p. 58; Blytt, Bidr. K. Norg., Sop. iii. (1892), p. 10; Mass., 

 Mon., p. 57. Cribraria vulgaris Schrad., I.e., p. 6 ; Rost., Mon., 

 p. 234; Cooke, Myx., Brit,, fig. 26; Mass., Mon., p. 61. 

 C. vulgaris var. aurantiaca Pers., Syn. Fung., p. 194. 



a. Stalk one and a half times the height of the sporangium ; 

 nodes broad, polygonal. 



(3. Stalk two to four times the height of the sporangium; 

 nodes triangular, narrow. 



