MYXOMYCETMS. 51 



On dead leaves, &c. (Fig. 246-249.) 



Stemonitis arcyrioldes, Cooke Fungi Britt., ser. i., No. 523. 

 Lamproderma arcyrioides, Cooke Fungi Britt., ser. ii., No. 523. 



On comparison of this latter form with the description of L. arcy- 

 rioides, as given by Rostafinski, and the specimens published by 

 Fuckel (No. 1447), and Rabenhorst (F. Eur. 797), we are 

 convinced that the present is very distinct, the capillitium is 

 much more slender, entirely different in its character, and the 

 spores are much smaller and nearly smooth. For the present we 

 have not proposed it as a distinct species. 



Family 7. ENERTHENEMACE^E. 



Sporangium stipitate ; stem prolonged within the sporangium 

 as a coluniella through its length and expanding at the apex in a 

 discoid membrane ; capillitium only originating from the stout 

 discoid expanded apex of the columella. Rtfki. Mon., 208. 



Genus 20. ENERTHENETOA. Sorvm. 



Threads of the capillitium rarely forked, not combined into a 

 net, with the ends free. Rtfki. Mon., 209. 



60. Enexthenema papillata. (Pers.) 



Sporangia globose, naked, dull-brown, lustrous above, crowned 

 with a very small blackish horn, stipitate ; stem black, opaque, 

 conical, at the passage into the columella distinctly narrowed ; 

 columella conical, widened at the apex of the sporangium into a, 

 vesicular boss usually horn-like, black, shining, standing on the 

 surface of the sporangium; capillitium originating from the margin 

 and bottom of this boss, tubes equal through their whole length, 

 not numerously forked, with the ends free ; spores bright- violet, 

 smooth, -0086--01 mm. diani. Rtfki. Mon,, 209. 



On rotten wood. (Figs. 45, 48, 49, 52, 57.) 



Arcyria atra, Schum. Saell., 1487 (1803). 



Enerthenema elegans, Bowm. Linn. Trans. (1828) ; xvi., p. 151, 

 t. 16; Rtfki. Mon., p. 209. 



Stemonitis mammosa, Fr. S. M., iii., 161 (1829). 



Stemonitis papillata, Pers. disp. fung., t. i., f. 4 ; Berk. Eng. 

 Fl. v., p. 317. 



61. Enexthenexna Berkeley ana. 1>. 



Very similar in habit to the preceding; it differs in the spores 

 being gathered together from 4 to 12 in a lump, the single spores 

 Laving the form of a sector of a circle, with a radius of '013 mm.; 

 the convex portion distinctly waited, the rest smooth ; threads of 



