Cribraria.] BRITISH MYCETOZOA. 31 



Genus 20. CRIBRARIA Persoon. — Sporangia globose, stalked ; 

 sporangium-wall persistent and usually 

 forming a cup in the lower half, continued 

 above in a net of slender threads more 

 or less thickened at the nodes, evanescent 

 in the meshes. Spores nearly smooth. 



1. C. argillacea Pers. — Sporangia 

 shortly stalked, sometimes sessile, crowded, 

 clay-coloured ; sporangium-wall subper- ^ 

 sistent throughout, cup imperfectly de- Cribraria 'aurantiaca 

 fined ; net usually continued to the base, Schrad. 



nodes scarcely thickened. Spores ochra- «■ ^Z^^""^ Tw ' Ce 



CeOUS. t; u. diam. *■ Sporangium after dispersion 



; r , ~ , , . of the spores. Magnihed 



Hab. On dead wood. 20 times. 



2. C. rufescens Pers. — Sporangium rufous-brown, with a cup 

 one-third its height distantly toothed on the margin ; net wide- 

 meshed, threads firm, nodes scarcely thickened. Stalk as long as 

 the sporangium, black. Spores pale yellowish-red, 6 /x diam. 



Hab. On dead fir wood. 



3. C. macrocarpa Schrad. — Sporangia robust, o # 6 to o - 8 mm. 

 diam., nut-brown ; the cup marked with numerous longitudinal ribs 

 and perforated towards the deeply toothed margin, which merges 

 into an irregular net with branching nodes. Spores ochraceous, 5 p 

 diam. 



Hab. On dead fir wood. 



4. C. aurantiaca Schrad. — Sporangium nut-brown, with a cup 

 one-third its height, deeply toothed on the margin ; net with slender 

 threads and flat, angular, branching nodes. Stalk two to four times 

 the length of the sporangium, dark brown. Spores ochraceous, 

 5 /a diam. 



Hab. On dead fir wood. 



5. C. intricata Schrad. — Sporangium ochraceous-brown, with a 

 cup one-third its height, or wanting; the net close, delicate, regular; 

 nodes numerous, small, prominent, often branched, dark brown, with 

 many free rays. Stalk long, subulate. Spores ochraceous, 5 /x diam. 



Hab. On dead wood. 



6. C. tenella Schrad. — Differs from C. intricata in the nodes ot 

 the net being round and without free rays. 



Hab. On dead wood. 



7. C. pyriformis Schrad. — Sporangium brittle, purplish-brown, 

 with a cup one-third its height; net with brownish-yellow firm 

 threads, and dark, somewhat triangular, nodes; these and the yellowish 

 sporangium-wall are densely beset with large purple-brown plasmodic 

 granules, 2 ^ diam. Stalk dark purple-brown. Spores pinkish- 

 ochre, 5 /a diam. 



Hab. On dead wood. 



