138 ENDOSPOREvE. [CRIBRARIA. 



ejfusa Mass., Mon., p. 41. Licea spermoides Berk. & Curt., in 

 Grev., ii., p. 68. Tubulina spermoides Mass., Mon., p. 37. 

 /'hysarum ccespitosum Peck, in Rep. N. York Mus., xxvi., 

 p. 75. P&richwna Cfespitosa Peck, in Rep. N. York Mus., x>xi. 

 p. 57. Tubulina cwspitosci Mass., Mon., p. 43. 



o. genuina : sporangia combined into an sethalium. 



6. simplex Rex : sporangia shortly cylindrical, closely com- 

 pacted, sessile, rarely free and stalked. 



Plate LI., B. a. vertical section of part of a pulvinate lethalium, x 1) ; 

 b. fragment of sporangium-wall and spores, x 280 ; c. closely compacted 

 tubular sporangia, j3. simple,!', x 9 ; d. sessile and stalked sporangia, /3. 

 .<simple,v, closely allied to Cribraria argillacea, x 9 ; c. fragment of spo- 

 rangium-wall, and spores of same, x 280 ; /. spore, x GOO (United States). 



The form ft. simplex has hitherto been recorded only from the 

 United States, and has been described by Dr. Rex (/.c.), where he gives 

 a full account of the genus Lindbladia and of the relationship which 

 exists between L. effusa and Cribraria argillacea. His gatherings show 

 a complete series of intermediate forms between the two species. 

 Licea spermoides Berk. & Curt, is var. simplex of Rex ; it is repre- 

 sented by several specimens in the Kew Collection, including the type 

 from Alabama referred to by Rostafinski in his App., p. 32, and given 

 by him as a synonym for Cribraria argillacea (K. 1695) ; the spo- 

 rangium-wall is bestrewn with dark plasmodic granules, but there is no 

 indication of a net to warrant its being placed under C. argillacea. 



flab. On dead wood, etc. a. Buhner, Yorks (L:B.M.103); a. Aboyne, 

 Scotland (B. M. 244) ; a. Sweden (K. 1658) ; a. and /3. Philadelphia 

 (L:B.M.103) ; /3. Iowa (B. M. 822) ; /3. S. Carolina (B. M. 948). 



Genus 23. CEIBRARIA Persoon, in Homer, Neues Mag. Bot., 

 i., p. 91 (1794). Sporangia globose or subpyriform, stipitate ; 

 sporangium-wall persistent, and forming a cup in the lower half, 

 or reduced to a basal disc, continued above in a net of slender 

 threads more .or less expanded and thickened at the nodes; the 

 wall membranous and evanescent in the meshes of the net. 



KEY TO THE SPECIES OF CRIBRARIA. 

 A. Nodes of the net not expanded : 



A. Sporangia clay-coloured, cup imperfectly defined,* spo- 



rangium-wall subpersistent above. 1. C. argillacea 



B. Sporangia crimson. 2. C. rubiginosa 



c. Sporangia rufous or nut-brown, cup well-defined or 

 obsolete 



Sporangia 0'6 mm. diam. 3. C. rufescens 



Sporangia O'l to 0-2 mm. diam. 4. C. minutissima 



