19 



capable of showing the itsci and spores, has, to the naked eye, a bright 

 lemon coloui' throughout. I cannot see the slightest trace of a margin 

 even in very yoimg apothecia, and, as the reaction is always as indicated 

 above, I have no doubt this lichen is distinct, although it has certain 

 affinities to L. Ehrhartiana (Ach,). On trees. 



Lecidea amphorodes (Sp. Nova).— Thallus dark ashy grey, rimulose, 

 thin. Apothecia small, black, pi-ominent, flat in a young state, and 

 smooth, with a slight border; convex, immarginate and rugose, when 

 mature. Section of apothecium pale throughout, seated on a brownish 

 grumous stratum ; paraphyses scattered, distinct, colourless, filiform, 

 densely matted together at their thickened apices ; asci pyriform, lower 

 extremity attenuated and easily detached, walls composed of a double 

 hyaline membrane, with a broad intervening space resembling, in this 

 respect, the epispore in Lecidea sanguinaria ; spores large, four, six or 

 eight, in asci oblong-cylindrical, multiseptate, with longitudinal septa. 



A remarkable phenomenon is seen in a microscopical preparation of 

 this lichen, of some months' standing, viz., filaments are seen arising from 

 many detached S])ores—Jlrst, from the extremities; second, from the septa, 

 or in a line with them. Whether this is the result of germination or not, I 

 cannot determine, as I have very few apothecia left, and do not care to 

 destroy more until I see whether it is possible to secure other specimens. 

 ■ — A ver} distinct and curious lichen. On trees. 



Lecidea maculosa (Sp. Nova). — Thallus whitish, thin, determinate^ 

 continuous or slightly rimulose, somewhat rugulose (K y C y) ; hypo- 

 thallus black ; apothecia black, sessile, flat, moderate, separate or 

 conjoined, with a prominent black margin ; spores eight, colourless, the 

 great majority curved, ellipsoid, one septate "016 X '007 m m. ; para- 

 l)hyses slender, distinct, with black very much enlarged, club-shaped ex- 

 tremities, which are matted together; thalamium pellucid; hypothecium 

 a beautiful reddish brown, subtended by a pale stratum, which rests on 

 the black entire exciple.^On bark, Wellington. 



On the same piece of bark were detected a few apothecia of Lecidea 

 melanotTO])a (Nyl.), having their characteristic appearance. In all 

 specimens of the latter lichen that I have seen, the epithecium alone 

 turns livid, while the smooth margin retains its pale colour. 



Lecidea implicata (Sp. Nova). — Thallus white, smooth, thin, glaucous, 

 rimulose (K— C— ) ; apothecia large, sessile, flat or somewhat convex, 

 pale bufi" colour, pruinose, rugose, border smooth, somewhat inflexed ; 

 paraphyses distinct, filiform, densely matted together, and giving off 

 lateral filaments; hypothecium yellowish brown; spores eight, colourless, 



