DIFFERENCES AMONGST FUNGI. 



491 



little brown coats (see fig. 355 i^). And all these peculiar forms arise under similar 

 external conditions from apparently similar slimy and formless masses of proto- 

 plasm. 



The same thing occurs in the Mushroom and Toadstool Fungi (Hymeno- 

 mycetes) which develop in the mould of the forest ground and on the dead bark 

 of tree-trunks. The mycelium is a network of white threads and strands, and 

 neither the form of the colourless elongated cells composing the network nor 



Fig. 366. — MyxomyceteB. 



1 A group of sporangia of Stemonitis /usca. 2 a single sporangium; x 6. * Dendritic mass of sporangia of Spumaria alba on 

 a Grass leaf. * Sporangium of Bictydium cemuum; x 25. * A group of sporangia of the same. ^ and ' Sporangia of 

 Craterium jninutuTn; 6 x 25. 8 Sporangia of Arcyria punicea. 9 A single sporangium; x 10. 10 Part of the net-like 

 oapillitium of the same; xl60, n ITructification of Lycogala epidendrum on a piece of wood. 12 Leocarpus fragilis; a 

 Plasmodium on the right; several sporangia on the left. 



the protoplasm within the cells afford any indication by which we can judge 

 the species to which the mycelium belongs. But how different are the fructi- 

 fications proceeding from these apparently identical mycelia. In a part of the 

 Eorest ground not twenty paces across there grow large specimens of Boletus 

 zdulis with chestnut-brown hemispherical caps; a little distance off a group of 

 [Ihantarelles (Gantharellus cibarius), with yellow colour like yolk of egg, close 

 by the Fly-agaric {Agaricus mnuscarius or Amanita muscaria), with snow- 

 white stipe and crimson cap (pileus) spotted with white, and near at hand, from 



