The Myxomycetcs of the Miami Val/ey, Ohio. 35 



and spores yellow ; elaters simple or sometimes branched, 3-4 

 mic. in thickness, with a few distant projecting rings, the sur- 

 face smooth between, or with very faint spirals, the extremi- 

 ties obtuse, or sometimes with a minute apiculus. vSpores 

 angularly or irregularly globose, the surface reticulate, 11-14 

 mic. in diameter. 



Growing in small patches on and within rotten wood. 

 Sporangia .4-. 5 mm. in diameter; the elaters variable, some 

 with as many as a dozen projecting rings, some with but a few 

 or nearly smooth. Tricliia iiifois, Libert. 



2. Oligoxema I'L'SiLL.v, Schr. Sporangia subglobose, 

 irregular, sessile, .scattered or collected together in heaps ; the 

 wall thin, yellow, smooth and shining. Mass of capillitium 

 and spores yellow ; elaters simple or sometimes branched, 4 

 mic. in thickness, sometimes with thicker inflated portions, 

 the surface marked with low faint spirals or perfectly smooth; 

 the extremities rounded and usually terminating in a smooth 

 point, 3-5 mic. in length — this point either curved, bent to 

 one side or turned back, and twisted around the extremity as 

 a ring. Spores angularly or irregularly globose, the surface 

 reticulate, 11-14 mic. in diameter. 



Growing in small clusters in rotten wood. Sporangia .3-.5 

 mm. in diameter; the elaters variable in length, scarcely 

 exceeding 100 mic. and often much shorter. Trichia pusilla, 

 vSchroeter. 



b. Elaters ivith no projecting rings. 



3. OijGONEMA FLAViDUM, Peck. Sporangia obovoid to 

 oblong, sessile, closely crowded and irregular from mutual 

 pressure; the wall thin, yellow, shining, punctuldte or minutely 

 granulose. Mass of spores and capillitium yellow ; elaters 

 simple or sometimes branched, 3-4 mic. in thickness, some- 

 times with thicker inflated portions ; the surface punctulate 

 or minutely warted, occasionally marked with very faint 

 spirals; the extremities usually rounded and obtuse, some- 

 times acute, and rarely with a minute apiculus. Spores 

 angularly or irregularly globose, the surface reticulate, 11-14 

 mic. in diameter. See Plate I, Fig. 24. 



