NiCARAGUAN MyXOMYCETES. 383 



Seems to be near P. glaucmn Phillips, but differs at sight in 

 the shape, aggregation and general character of the sporangia. 



The species is more calcareous than an}' Physarum I have 

 seen. The lime sometimes occupies far more space in the 

 sporangium than the spores. 



Collected at Ometepe by Mr. Shimek. 



24. Physarum maculatum Macbride. n. s. Plate X, Figs. 



I, la and \b. 



Sporangia scattered or gregarious, very small, dull gray, 

 thin-walled, dotted with minute calcareous granules, stipitate; 

 stipe long, stout, attenuated upwards, striate longitudinally or 

 wrinkled, stuffed with irregular yellow masses of lime and 

 accordingly bright yellow in color; columella none; capillitium 

 forming a dense net wdth comparatively small yellow nodular 

 thickenings; spores globose, purplish, each minutely papillose 

 and displaying several scattered spots occasioned by local 

 development of papillte; diameter of the spores p-iO//. 



Collected at Castillo by Mr. Shimek. 



Near P. schoeteri R., from which it may by distinguished by 

 shape of sporangium, absence of columella, etc. 



25. FuLiGO VARiANS Sommerfelt. 



Typical. Said to be rare. 



Collected by Mr. Shimek on Ometepe. 



