56 A Monograph of the Myxogastres. 



Crilraria piriformis, Schrad., Nov. PL Gen., p. 4, pi. 3., 

 f. 45 ; Host., Hon., p. 237, fig. 14; Cooke, Brit. Myx., fig. 14; 

 Sacc., Syll, n. 1416. 



On rotten pine wood. Scotland ; Sweden ; Germany. 



Gregarious, several often springing from a common hypo- 

 thallus; 2 3 mm. high, resembling superficially some forms 

 of C. macrocarpa, but at once distinguished by the large, 

 irregularly stellate, distinct nodes of the network, connected by 

 slender strands. 



Cribraria macrocarpa, Schrad. (f. 110). 



Sporangia broactty obovate, stipitate, erect, upper portion 

 ycllmoish-brcrtvn, calyculus brownish-purple, funnel-shaped, occu- 

 pying one-third or more of the sporangium; sometimes per- 

 forated towards the very irregular margin, the projections of 

 which are prolonged as flattened, granulose, coloured, irregularly 

 curved bands of varying width, and anastomosing at various 

 points, with numerous lateral projections which are continuous 

 with the projections of adjoining ribs as thin strands bridging 

 the irregular meshes formed by the larger ribs; stem stout, 

 erect, simple, or 2 3 more or less grown together, purplc- 

 brown, rugulose, expanded at the base into a spreading hypo- 

 thallus; spores pale yellow, globose, smooth, 7 10 p. diameter. 



Cribraria macrocarpa, Schrad., Nov. P,}. Gen., p. 8, t. ii., 

 f. 34 ; Cooke, Myx. Brit., p. 59 ; Sacc., Syll., n. 1417 ; Rost., 

 Mon., p. 238. 



On decayed wood. Britain (Glamis, N. B.) ; France ; Switzer- 

 land ; Germany ; Sweden. 



Crowded or scattered, sometimes 2 3 more or less combined 

 to form an aethalium. The obovate sporangia and peculiar 

 structure of reticulation characterize the present species, the 

 broad, flattened, primary ribs by irregular bifurcation, combine 

 to form a network of irregularly elongated meshes, which are 

 bridged over by lateral thin strands from the sides of the 

 larger ribs. Well-defined distinct nodes connected by thin 

 strands are absent. 



