544 DR. LINDSAY ON NEW-ZEALAND LICHENS. 
more common on the forest-trees of Otago than Pertusaria communis or the white, crus- 
taceous, corticolous Zecanore. 
Spores variable in form and size, fusiform, rounded at ends, sometimes subangulous or 
broader at one end, colourless, muriform, 0024” to :0036" long, ‘0006” broad. Thecæ 
8-spored, not affected by iodine, very large, 0060" long, 0012” broad. Paraphyses dis- 
crete, filiform, colourless, considerably exceeding thecæ in length, without clavate heads; 
tips obscured by a slight amount of granular greenish-yellow colouring-matter. Hy- 
menium unaffected by iodine, in section one of the most beautiful and instructive 
among lichens. Hypothecial cellular tissue granular, pale green yellow. 
Specimens resembling the Otago plant occur in herbarium Kew, from the North 
Island (Colenso), in fruit. 
Sp. 2. T. moxosporum, Nyl. (L. N. Z., 254.] (Fig. 4.) 
On the branches of trees, East Taeri bush, Otago: W. L. L: associated with Parmelia 
pertusa and other common corticolous lichens. Spores fusiform, subangulous, with ob- 
tuse rounded ends, muriform, yellowish in the young state and while in the thecæ, 
gradually assuming an olive or brown tint, more or less dark, according to age, “0036” 
to 0045” long, 0009” broad. Thecæ 1-spored, resembling, with their spores, those of 
Lecanora chrysosticta. Paraphyses discrete, filiform, colourless, without clavate heads, 
considerably exceeding thecæ in length. Hymenium unaffected by iodine; beautiful in 
section under the microscope. Hypothecium scarcely coloured. : 
The 1-spored thecæ and the brown or olive spores render it impossible to confound 
this with the preceding much commoner species. 
Genus XXVII. Canocontum. (Plate LXIII.) 
Sp. 1. C. IMPLEXUM, Nyl. (Fig. 5.) 
On trunks of trees, living and dead, Saddle-hill bush, Otago: W. L. L.: partlyi n 
fruit, partly sterile. The apothecia have much the aspect of those of Gyalecta, both as 
to colour and form ; they vary from urceolate in the young, to convex in the old state. 
The disk sometimes becomes pale, or, in the old state, it falls away, leaving the pale 
cup of the hypothecium. The flesh-coloured apothecia contrast beautifully with the 
green of the fur-like thallus, which consists entirely of a filamentous confervoid tissue, 
giving it the character of an Alga on one hand, and of a Fungus (Dictyonem^ 
Hymenomycetes, sect. Awricularini) on the other. The thalline filaments consist 
of tubules resembling those of Confervæ, about :00045" to :0006" broad, long, irre- 
gularly branching, divided into loculi or elongated cellules of unequal size and full of 
green granular colouring-matter (chlorophyll). The apothecia and their contents have 
much of the characters of those of Zecidea pineti. Hymenium colourless or very pale 
blue under iodine. Paraphyses discrete, with slightly thickened heads, which are of à 
pale yellowish-brown tint. Thecæ 8-spored, ribbon-shaped, 0024” long, 00025” broad. 
Spores (e) ellipsoid, colourless, 1-septate, 0003” long, ‘0002’ broad. Hypothecium pale 
brownish yellow. 
