11 



niicroscopo, eitlier ou account of its delicacy or because of its being inter- 

 mingled with tli§ organic tissues in which it has developed. 



Soniotinics mycelium unites in bundles more or less thick and branched. 

 This has been called the fibrous mycelium. Where the filaments inter- 

 cross closely, are felted, and inclined to form a membrane, it is hymeuoid 

 mycelium. Where the filaments are so small and close that they form 

 very compact bodies, constituting those solid irregular products called 

 sclerotium, it is scleroid or tuberculous mycelium. With malacoid myce- 

 lium Ave have nothing to do in this paper. It is a soft, pulpy, fleshy 

 mycelium. 



Systematists have divided the Agaricini into groups according to the 

 color of their spores. These groups are defined as follows by various 

 authors : 



According to — 



Elias Fries, 5 groups : Leucospo7'us, white ; Hi/porhodms, pink ; (Jortinaria, ochra 

 ceous ; Denninus, rust ; Pratelln, purplish bhxck. 



Rev. J. M. Berkeley, 5 groups : Very frequeutly pure white, but presenting also 

 pink, various tints of brown, from yellowish and rufous to dark bister, purple-black, 

 aud finally black; Leucospori, white; llyporhodli, salmon; Dermini, ferruginous; 

 Prati'UiT, brown ; Coprinajius, black. 



Dr Badham, 6 groups ; Pure white or a yellow tinge ou drying ; brown ; yellow ; 

 pink ; purple ; purple-black ; some pass successively from pink to purple and from 

 purple to purple-black. 



Mrs.Hussey.il shades : White; rose; pale ocher; olivaceous-ocher ; reddish-ocher ; 

 ochraceous ; yellowish olive-green ; dull brown ; scarcely ferruginous ; snuff-color ; 

 very dark biowu. 



Hogg & Johnson, 5 groups : Leucosporei, white ; Hyporhodii, salmon ; Dermini, 

 rusty ; Pratetla', purplish-brown ; Vuprindrii, black. 



C. Gillet, 7 shades : White; pink; ochraceous; yellow; ferruginous; black or pur- 

 plish black : round, ovate, elongated, or fusiform, smooth, tuberculate or irregular, 

 simple or composite, transparent or nebulous, etc. 



Jules Bel. •'5 groups ; White ; pink ; red ; brown ; black. 



Dr. Gautier, 5 shades ; White ; pink ; brown ; purplish-browu ; black. 



Constantin & Dufour, 5 groups ; White ; pink ; ochraceous ; brownish-purple ; 

 black. 



J. P. Barla, 7 groups: Leucosporii, white; Hyporhodii, pink; Cortinari(B, ochra- 

 ceous ; Dermini, rust ; Pratelloe, purplish-black ; Coprinarii, blackish ; Coprini and 

 Gomphi, dense black. 



L. Boyer, 5 groups, 11 shades : White to cream yellow ; pale pink to ochraceous 

 yellow ; bay or red brown to brown or blackish bister ; rust color, cinnamon or light 

 yellow. 



W. D. Hay, 5 groups : White ; pink ; brown ; purple ; black. 



C. H. Peck, 5 groups ; Leucosporii, white ; Ilyporhodii, salmon ; Dermini, rust ; 

 Pratellce, brown ; Ooprinarii, black. 



Saccardo divides the Agaricini into four sections, according to the color of their 

 spores, as follows: Spores brown, purplish brown or black, Melanoajmra ; spores 

 ochraceous or rusty ochraceous. Ochrospora; ; spores rosj' or pinkish, Rhodoxporm ; 

 spores white, whitish or pale yellow, Leucosporcc. 



Dr. M. C. Cooke, 5 groups : Leucoxpori, white or yellowish ; Ilyporhodii, rosy or 

 salmon color ; Dermini, brown, sometimes reddish or yellowish brown ; Pratela, 

 purpFe, sometimes brownish purple, dark purple, or dai-k brown ; Coprinarii, black or 

 nearly so. 



These shades are somewhat different from the colors of the mushrooms' 

 gills, so that, when it is of importance to determine exactly the color of 

 the spore in the identification of a species, we may without recourse to 

 the microscope cut off the stem of an adult plant on a level with the gills 

 aud place the under surface of the cap upon a leaf of white paper if a 

 dark-spored species, aud upon a sheet of black paper if the spores are 

 light. At the expiration of a few hours we will find, on lifting the cap, 



