CRIBRARTA.] HETERODERMACE^E. 147 



Plate LVT., A. d. sporangia after dispersion of spores, x 20; c. part of 

 net and margin of cup, x 180; /. spore and plasmodic granules, x G<u 

 (United States). 



This species is nearly allied to C. purpurea. 



Hal. On rotten wood. New York (L:B.M.117); S. Carolina 

 (B. M. 675, 941). 



15. C. violacea Rex, in Proc. Acad. Nat. Sc. Phil. (1891), 

 p. 393. Plasmoclium " deep violet-black, in rotten wood " (Rex, 

 I.e.). Total height O5 to 1 mm. Sporangia globose or ellipsoid, 

 stipitate. erect or slightly nodding, gregarious, about O2 mm. 

 cliam., dark violet with a metallic sheen ; cup varying in extent 

 of development, two-thirds the height of the sporangium or more, 

 or reduced to one-third, membranous, violet-blue, the margin 

 scalloped with few short teeth ; net of delicate threads connected 

 with broadly expanded, flat, angular nodes ; " exceptionally the 

 apical portion is nearly entire, being simply perforated with 

 three or four oval or rounded openings " (Rex). The cup and 

 nodes are beset with minute purple plasmodic granules 0*5 to 1 

 [j, diam. Stalk slender, subulate 3 to 5 mm. long, violet-black. 

 Spores lilac, minutely and closely warted. 6 to 8 /JL diam. 



Plate LVI., A. g. sporangium after dispersion of spores, x 20 (England) ; 

 //. part of net and margin of cup of same, x 180 ; i. sporangia after dis- 

 persion of spores, x 20 (United States) ; A', part of net and cup of same, 

 x ISO ; spore and plasmodic granules, x 600. 



In July, 1893, and in September, 1894, fine gatherings of this beautiful 

 and minute species were obtained by Mr. J. Saunders from the under 

 side of a rotten fir-log near Ivinghoe, Bucks ; the colour of the spor- 

 angia, stalks and spores is violet-blue, and they resemble the American 

 specimens received from Dr. Rex in all respects except that in many 

 cases the cup of the sporangium-wall is one-third to one-half the 

 height of the sporangium instead of two-thirds or more. It differs 

 from C. elcc/ans in the longer stalks, the smaller sporangia, in the 

 blue-, not red-purple colour, in the smaller plasmodic granules in the 

 knots and sporangium-wall, and in the larger violet-blue spores with 

 a thicker epispore. 



Hab. On fir- wood. Ivinghoe, Bucks (L:B.M.118) ; Philadelphia 



SPECIES NOT MET WITH IX THE QUOTED COLLECTIONS. 



16. C. tatrica Racib., in Hedw. (1885), p. 170. Sporangia 

 globose, red-brown, | to 1 mm. diam., stalked ; stalk dull red, 

 straight, 2 mm. long ; cup irregularly crenate-dentate, closely 

 perforated at the margin ; nodes of the net not enlarged ; spores 

 smooth, yellow, 6 to 7 ^ diam. 



Hab. On rotten wood. Tatra, Hungary. 



This description suggests C. aurantiaca /3., in which the nodes of the 

 net are only slightly enlarged. 



C. stellata Schuni., C. didermoides Schum., C. badia Chev., are 

 excluded by Rostafinski on what appear to be sufficient grounds. 



