India Coral-like papillae with dark apices. 



Medulla The usually colourless internal tissue. 



Jf wri/brin With transverse and irregular longitudinal divisions. 



jV wc fra, Roundish, with an apical pore. 



Ostiole An apical pore. 



Paraphyses Slender filaments among the thecse. 



Peridioid Roundish, without a pore. 



Peridium The hypothec! urn of a peridioid apothecium. 



PodetiitmAn erect cylindrical thallus terminated by the fruit. 



Polari-bilocular With a loculus at each end. 



Pycnides Conceptacles bearing stylospores. 



Pyrenium The hypothecium of a nuclear apothecium. 



ScyphtisA. dilated cup-shaped fruit borne on a podetium. 



Soredia Powdery masses of gonidia and hyphae. 



Stylospores Asexual spores. 



T/uilamiumThe paraphyses. 



Thecee The spore-sacs. 



Thecium = Hvmenium. 



CHEMICAL REACTIONS. 



The solutions employed are : (1) Hydrate of potash, denoted by the 

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

 (2) Hypochlorite 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 grain, iodide of potash 3 grains, and distilled water 

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

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

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

 duction of a crimson coloration iipon the application of the solution 

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

 Kf-f- yellow means a faint yellow reaction with solution K. The 

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

 K+orai? 11 means tnat tlie reaction of the cortex is yellowish and 

 that of the medulla orange. K(CaCl) -(-violet means that K alone 

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

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

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

 by K + (CaCl) . A more or less fuscescent colour produced by K 

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

 t-ign. 



