GLOSSARY OF THE PRINCIPAL TERMS 
EMPLOYED. 
Anaphyses—Filaments springing from the upper inner surface of the 
hypothecium. 
Applicate—Forming the thalline border in many crustaceous lichens. 
Arthrosterigmata—Jointed sterigmata: 
Axial—Composed of the basal but enclosed filaments of the axis. 
Basidia—The filaments bearing stylospores. 
Cephalodia—Tubercles containing gonimia. 
Corter—tThe limiting tissue of the thallus. 
Cretaceous—Consisting chiefly of oxalate of lime.’ 
Crustaceous—Forming a more or less thickish crust, generally attached 
by the whole under surface. 
Cyphelle—Minute empty cavities on the underside of the thallus. 
Determinate—With a distinct margin. 
Discoid—More or less basin-shaped. 
Effuse—Without a clearly defined outline. 
Endosp ve—Inner layer of wall of spore. 
Epispore—Outer layer of wall of spore. 
Epithallus—The external layer of the cortex. 
Enpithecium—The surface of the hymenium. 
Evanescent—Reduced to mere gonidia scattered over the substratum. 
Exciple proper—The hypothecium of a discoid apothecium. 
Gonidia—The green cells of the thallus. 
Gonidimia—Gyeen cells smaller than gonidia and with the cell-wall less 
distinct. 
Gonimia—Bluish-green naked granules. 
Heteromerous—With the constituent elements stratified: 
Homeomerous—With the constituent elements more or less mixed. 
Hymenial gelatine—The colourless amyloid substance permeating the 
hymenium. 
Hymenium—The layer of thecee and paraphyses. 
Hypophiceodal—Consisti ‘2 of a very thin film often concealed beneath 
the bark of trees and between the interstices of rocks. 
Hypophylline—Consisting of the root-like filaments or rhizine. 
Hypothatlus—The basal tissue, being hypophylline, applicate, and axial. 
Hypothecium—The fundamental structure bearing the fructification. 
