SYNOPSIS OF MYCETOZOA 189 



19. Echinostelium De Bary. Sporangia stalked, very minute, 



50 [x diam., colourless ; capillitium branches few, arising from 



the apex of a short columella . . . E. minutum De Bary 



20. Lamproderma Bostafinski. Sporangia stalked, globose or 



ellipsoid (sessile in L. Lycopodii) ; sporangium-wall mem- 

 branous, somewhat persistent, shining, iridescent; stalk black; 

 capillitium of branching and anastomosing threads spreading 

 from the upper part of the columella. 



A. Sporangia stalked ; spores more or less spinulose : 



t». Spores echinulate, 15-20 /x . . . L. echinulatum 

 b. Spores spinulose, or nearly smooth 



a. The dark flexuose capillitium arising by a few (6-9) 



£ 



brandies from the apex only 01 the columella ; s 

 smooth * . . . " . . . . L. arcyrionema 



the abruptly ending columellar 

 Capillitium threads dark, pale at the base 



irideum Mass. 



Capillitium purple^ with hyaline tips ; stalk usually 

 2-3 mm L. physaroides Rost. 



Capillitium pale or brownish purple ; stalk 1 mm. or 

 less L. violaceum Rost. 



B. Sporangia sessile ; spores reticulated . L. Lycopodii Raunk. 



21. Clastoderma Blytt. Sporangia minute, stalked, brown ; 



sporangium-wall partly evanescent, partly persistent in the 

 form of minute discs at the apices of the rigid forking capilli- 

 tium threads ; columella short or hardly evident 



C. Debaryanum Blytt 



Order II. — Amauroch^tace.e. 



22. Amaurochsete Bostafinski. iEthalia pulvinate, composed of 



elongate confluent sporangia ; lateral sporangium-walls not 

 developed ; capillitium rising from the base in irregularly 

 flattened strands, and dividing into many anastomosing 



branches A. atra Rost. 



23. Brefeldia Rostafinski. iEthalia pulvinate, composed of sub- 



cylindrical, branched, and confluent sporangia ; capillitium 

 of numerous horizontal threads, those of adjacent sporangia 

 uniting on the boundary line, and there forming chambered 



- vesicles B. maxima Rost. 



Cohort II. — Lamprosporales. 



Subcohort I. — Anemine^:. 



Order I. — Heterodermace^. 



24. Lindbladia Fries. Sporangia either combined to form an 



*ethalium or closely compacted, usually with a strongly deve- 



