J8 endospoeejB. [cribraria. 



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

 rev., ii., p. 68. Tubidina spermoides Mass., Mon., p. 37. 

 hysarwrn ccespitosum Peck, in Rep. N. York Mus., xxvi., 



75. Perichcena coespitosa Peck, in Rep. N. York Miis., xs^xi.^ 



57. Tubulina ccespitosa Mass., Men., p. 43. 



a. genuina : sporangia combined into an fethalium. 



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

 peted, sessile, rarely free and stalked. 



Plate LI., B. — a. vertical section of part of a piilvinate sethalium, x 9 ; 

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

 [bular sporangia, ;8. simplex, x 9 ; ^. sessile and stalked sporangia, ;3. 

 vvpUx, closely allied to Cribraria, argillaoea, x 9 ; «. fragment of spo- 

 mgium-wall, and spores of same, x 280 ; /.spore, x 600 (United States). 



The form j3. simplex has hitherto been recorded only from the 

 Fnited States, and has been described by Dr. Rex (I.e.), where he gives 

 full account of the genus Lindbladia and of the relationship which 

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



complete series of intermediate forms between the two species. 

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

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

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

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

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

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



Hah. On dead wood, etc. — a. Bulmer, Torks (L:B.M.103); a. Aboyne, 

 cotland (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.— CRIBRARIA Persoon, in Romer, Neues Mag. Bot., 

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

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

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

 breads more or less expanded and thickened at the nodes ; the 

 rail membranous and evanescent in the meshes of the net. 



KEY TO THE SPECIES OE CRIBRARIA. 

 [. Nodes of the net not expanded : — 



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



rangium-wall subpersistent above. 1. G. argillacea 



B. Sporangia crimson. 2. C. ruhiginosa 



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

 obsolete — 



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



Sporangia O'l to 02 mm. diam. 4. G. minubissima 



