Inich'a — Coral-like papillae with dark apices. 



Medulla — The usually colourless internal tissue. 



Murifonn — With transverse and irregular longitudinal divisions. 



Nuclear — Roundish, with an apical pore. 



Osfiole — An apical pore. 



Paraphynes — Slender filaments among the thecae. 



Peridioid — Roundish, without a pore. 



Peridium— The hypothecium of a peridioid apotheeium. 



Podetium—An erect cylindrical thallus terminated by the fruit. 



Polari-hilocular — With a loculus at each end. 



Pi/cnides — Conceptacles bearing stylospores. 



Pyrenmm — The hA^othecium of a nuclear apotheeium. 



Sci/phus — A dilated cup-shaped fruit borne on a podetium. 



Soredia—Vovrdierj masses of gonidia and hyphse. 



Stylospores — Asexual spores. 



Thalamhnn — The paraphyses. 



Thecce — The spore-sacs. 



Thecium = Hvmeniuni . 



CHEMICAL REACTIONS. 



The solutions employed are: — (1) Hydi'ate of potash, denoted by the 

 symbol K, and composed of equal weights of caustic potash and water ; 

 (■2) Hyp()chlorite of lime, denoted by CaCl, and composed of chloride of 

 lime and about half its weight of water ; (3) Iodine, denoted by I, and 

 composed of iodine 1 graiu, iodide of potash 3 grains, and distilled water 

 i oz. For the sake of brevity, symbols are employed to express the 

 reactions. The explanation of a few examples will be found sutticieut to 

 explain the rest. Thus CaCl + crimson indicates the immediate pro- 

 duction of a crimson coloration upon the application of the solution 

 CaCl. CaCl— means that no reaction occurs with this reagent. 

 Kf-[- yellow means a faint yellow reaction with solution K, The 

 reaction of the cortex is placed above that of the medulla ; thus 

 j-+yeliowish jjjgans that the reaction of the cortex is yellowish and 



+ orange 



that of the medulla orange. Iv(CaCl)-|-vi'olet means that K alone 

 gives no reaction, but when it is followed by the application of CaCl 

 a violet colour is produced. (Jn the other hand, the reaction given by K 

 may be neutralized by the addition of CaCl, in which case it is expressed 

 by K-f (CaCl) — . A more or less fuscescent colour produced by K 

 or CaCl is disregarded, as not being a true reaction, and has the negative 

 .•-iirn. 



