MYXOMYCETES. 



43 



II. Wall of sporangium double, the outer much 



separated from the inner 



A. Capillitium almost non-existent 



B. Capillitium from the bottom to the top 



many times branched, fasciculate . 



C. Capillitium combined into a net. 



| Threads provided with numerous hook- 

 like thickenings .... 

 |f Capillitium without such thickenings. 

 Sporangia globose, chalky-white, with 



concolorous columella 

 Sporangia hemispherical, reddish flesh 

 colour, with concolorous columella . 

 Sporangia globose, leather-coloured, 

 columella rilled with crystals of lime 



III. "Wall of sporangium single, but much sepa- 



rated from the inner naked mass of 

 spores and Capillitium 

 A Sporangia provided with a columella, split- 



ting in a stellate 



manner, the divisions 



much crowded, reflexed, equal, sharp 



pointed ...... 



Divisions not numerous (4 to 8) ; spo- 

 rangia lenticular, either sessile or 

 stipitate ...... 



Divisions not numerous and irregular ; 

 sporangia exactly globose, with an 

 elongated stem . 



Without columella. 



Splitting in a stellate manner, divisions 

 not numerous, provided with glassy 

 shining warts . . 



Splitting either irregularly, or with a 

 central opening, or a 

 fissure 



longitudinal 



DIFFORME. 



Sauteri. 



calcareum. 



GLOBOSUM. 



iestaceum. 



vaccinum. 



(Leangium.} 



TREVELYANI. 



RADIATUM. 



FLORIFORME. 



(ERSTEDTII. 



Stalilii. 



[This table was printed by Rostafinski previous to the proposal 

 of the sub-genus Pseudo-diderma, and was not altered in conformity 

 therewith, hence it scarcely corresponds in some details with the 

 arrangement of the species, but we have not deemed it prudent to 

 make any emendations.] 



Genus 14. LEPIDODERIVIA. Deltary. 



Sporangium sessile or stipitate, now and then plasmodiocarp ; 

 walls single, covered with numerous very large scales, compounded 

 of a small quantity of its substance, combined with a large quantity 

 of lime; scales either loose from the wall, or enclosed in lenti- 

 cular cavities of the membrane ; columella usually evident. Rtfki. 

 187. 



