The Myxomycetes of the Miami Valley, Ohio. 27 



Capillitium consisting ot' a few long slender threads with 

 numerous scattered short branches, the threads 4-6 mic. in 

 thickness, golden-yellow ; the free ends of the branches ter- 

 minating in a slender spine; the spiral ridges three or four, 

 covered with numerous slender spinules. Spores in the mass 

 golden-yellow, globose, the surface reticulate, 10-12 mic. in 

 diameter. 



Growing on and inside of rotten wood. Plasmodiocarp an 

 irregular patch, one to several centimeters in extent, the 

 strands of the net about .5 mm. in thickness. A single reticu- 

 late Plasmodium is usually converted without change of form 

 into an individual plasmodiocarp. 



II. CALONEMA, Morgan, gen. nov. Sporangia subglobose, 

 irregular, sessile, without a hj^pothallus; the wall thin, marked 

 with branching veins, irregularly dehiscent. Capillitivim of 

 slender tubules, arising from the base of the sporangium, 

 repeatedly branched and with numerous free extremities ; the 

 surface traversed by a system of branching veins, ending in 

 minute veinlets, which appear as irregular rings and spirals. 

 Spores subglobose, yellow. 



The habit of the single species is that of an Oligonema, and 

 it has spores similar to those of most species of this genus, 

 but the threads are long and branched, and they are fastened 

 below to the base of the sporangium. 



I. Caloxema aureum, Morgan n. sp. Sporangia sub- 

 globose to turbinate, sessile, closely crowded and from mutual 

 pressure quite irregular ; the wall thin, marked with branch- 

 ing veins, golden-yellow in color, smooth and shining. Capilli- 

 tium of threads more or less branched, 5-6 mic. in thickness, 

 golden-yellow; the surface minutely venulose, and with larger 

 rings and spirals, and sometimes with scattered spinules ; the 

 free extremities obtuse. Spores subglobose, yellow, the sur- 

 face with elevated ridges combined into a network, 14-16 mic. 

 in diameter. See Plate I, Fig. 21. 



Growing on and within rotten wood. Sporangia quite 

 irregular and variable in size, .3-. 6 mm. in diameter. The 

 beautiful venation of the wall of the sporangium is continued 

 upon the surface of the threads of the capillitium. 



