1 58 ENDOSPORE/E. [ENTERIUIUM. 



(1845), p. G7. Dictydicethalium applanatwm Host., in Fuckel, 

 Symb. Myc., Nachtr. 2, p. 69. Reticularia vntoxantha Berk., in 

 llook., Journ. Bot. (1851), p. 201. Clathroptychium Berkeleyi 

 Mass., Mon., p. 53. 



Plate LXXVL, B. a. part of an fethalium seen from above, x 20 ; 

 b. tubular sporangia from an sethalium ; in two of them the spores are 

 dispersed and the caps and threads of the sporangium-walls are left free, 

 x 20 ; c. sporangia from a stouter aethalium, x 20 ; d. cap and threads of 

 sporangium-wall, x 50 ; c. hypothallus, areolated with the bases of the 

 sporangia, x 50 ; /. spores and portion of a thread, x 280 ; g. spores 

 and portion of thread from asthalium drawn at e. x 280 (England) ; 

 li. spore and thread from a stout asthalium, x 280 (Sikkim, K. 1669) ; 

 ?'. spore, x 600 (England) ; k. spore from type of Clathroptychium 

 Bcrlicleyi Mass., x 600. 



The spores are dispersed by the threads giving way at the base 

 and the sporangia separating in tufts from the persistent shining 

 hypothallus. American specimens have been received from Dr. Rex 

 which show an abnormal development ; the sporangium-wall is, to 

 a great extent, continuous between the threads, and forms a lattice- 

 work with wide expansions. An unusually stout form has been 

 obtained from Sikkim (K. 1669), and named Reticularia entoxantha by 

 Berkeley, but referred by Rostafinski to Clathroptychium rugulosum, 

 I.e. ; it is an olive-black sethalium, 3 mm. thick, and bright yellow 

 within ; the threads of the sporangia are 10 p. diam., waved and 

 thickened at the margins ; the spores are yellow and spinulose, 

 II to 11 p. Clathroptychium Berkeley! Mass., from Ceylon (K. 1666), 

 differs only from the robust forms of D. plumbeum in the more 

 strongly spinulose spores ; but as the spores of most gatherings vary 

 in the amount of roughness, this character alone is not sufficient to 

 mark specific difference. Clathroptychium cinndbarinum Sacc., in 

 Michelia, i., p. 545, is said to have vermilion sporangia, with blackish- 

 purple opercula and threads ; this description applies to immature 

 specimens of D. plumbeum. 



Hal. On dead wood. Rudloe, Wilts (B. M. 20) ; Batheaston, 

 Somerset (B. M. 292, 299) ; Luton, Beds (L:B.M.128) ; France (Paris 

 Herb.) ; Germany (Strassb. Herb.) ; Hungary (K. 828) ; Ceylon 

 (K. 1664) ; Sikkim (K. 1669) ; Australia (K. 834) ; Philadelphia 

 (L:B.M.128); New Jersey (B. M. 945); S. Carolina (B. M. 928, 

 947). 



SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 



2. D. dissiliens Hazslinszky, in Oester. Bot. Zeitsch., xxvii., 

 p. 85 (1877). Peridia pulvinate, round or oval, 2 to 5 mm. diam. ; 

 external wall chestnut-brown, dull pruinose ; the inner wall, 

 together with the spores and elaters, yellow-brown. Spores 

 8 to 10 /A. 



Hab. On willow. Hungary. The mature peridium bursts elastically, 

 and the elaters then become three times longer. 



Genus 31. ENTERIDITJM Ehrenberg, in Spreng. Jahrb. 

 Gewachs., I., ii., p. 55 (1818). ^Ethalium of^confluent interwoven 

 sporangia, their walls perforated with large openings ; capillitium 

 none. 



