76 A Monograph of the Myxogastres. 



ducing very much thinner branchlets, which are combined 

 amongst themselves at all points to form a rather loose net- 

 work, the, peripheral meshes of the network formed of combined, 

 arcuate threads, and slightly smaller than the rest, especially 

 towards the base of the capillitium ; spores 9 12 jx, diameter, 

 pale violet, verruculose. 



Stemonitis macrosperma, Racib., Myx. Crac., p. 8 ; Sacc., Syll., 

 vii., 1, n. 1361. 



Var. obovata. Racib., sporangia obovate, 0*5 0'75 mm. 

 broad. With the type. 



Var. oblonga. Racib., sporangia oblong, 0'75 1 mm. long, 

 0'3 0'5 mm. broad. With the type. 



Poland. 



Stemonitis Suksdorfii, Mass. 



Gregarious, stipitate, sporangia cylindrical, very obtuse at 

 both ends, wall iridescent, evanescent; stem blackish-brown, 

 shining, about equal in length to sporangium, tapering upwards, 

 rather stout, becoming dilated at the base into a hypothallus ; 

 spores in the mass blackish-purple. Columella rather thick, 

 sub-equal, blackish, usually becoming abruptly divided into 

 branches at some distance below the apex of the sporangium; 

 sometimes more or less flattened at the apex, and with a 

 tendency to become discoid ; capillitium exceedingly dense, dark, 

 main branches originating from the columella; stout, taper- 

 ing, branches arcuate, combined to form an irregular, small- 

 meshed network; spores bright lilac, minutely warted, 7 8 /x 

 diameter. 



Comatricha Suksdorfii, Ellis and Everh. 



On wood, bark, &c. United States. 



(Described from a portion of type specimen communicated 

 by Wingate.) 



From 5 6 mm. high. 



Stemonitis affinis, Mass. 



Sporangia cylindrical, obtuse, up to 2 mm. high ; stem from 

 its shortness scarcely distinct : columella reaching almost to apex 



