Gastromycetes 



4. GEASTER. Page 580. 



Inner peridium dehiscent at the apex by a single mouth ; columella 

 present; threads of the capillitium simple, tapering to each extremity. 



5. ASTR/EUS. 



Inner peridium membranaceous ; dehiscent at the apex by a single 

 mouth; columella none; threads of the capillitium very long, much 

 branched and interwoven. 



6. MlTREMYCES. 



Inner peridium cartilaginous, dehiscent at the apex by a stellate fis- 

 sure ; columella none ; threads of the capillitium very long, much 

 branched and interwoven. 



II. CORTICATE. 



Outer peridium (cortex) a soft, fragile, more or less deciduous layer, 

 often with external projections in the shape of warts, spines or scales. 



(c) Peridium stipitate. 



7. TYLOSTOMA. Page 582. 



Peridium membranaceous, dehiscent by a regular apical mouth; 

 threads of the capillitium very long, much branched and interwoven. 



(^) Peridium sessile, but with a more or less thickened base. 



8. CALVATIA. Page 582. 



Peridium large, globose or turbinate, breaking up into fragments from 

 above downward, and gradually falling away; threads of the capillitium 

 very long, much branched and interwoven. 



9. LYCOPERDON. Page 589. 



Peridium small, globose, obovoid or turbinate, membranaceous, de- 

 hiscent by a regular apical mouth, threads of the capillitium long, slen- 

 der, simple or branched. 



10. BOVISTELLA. Page 608. 



Peridium subglobose, membranaceous, dehiscent by a regular apical 



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