OF FILAMENTOUS, FRUTICULOSE, AND FOLIACEOUS LICHENS. 209 
Specimen 1.—Old wall, Caerlaverock Road, Dumfries, August 1856, W. L. L. 
The edges of the thallus are marked by the presence of a few rudimentary 
cilia; the surface is fibrillose beneath; there are marginal soredia on some lobes. 
The spermogones are few, depressed, punctiform; the spermatia about ;,th 
long; the sterigmata of several cylindrical cells, irregularly articulated. 
Specimen 2.—Banks of Crinan Canal, Argyllshire, August 1856, W.L.L. The 
margins of some of the lobes are sorediiferous, of others black-ciliate. The sper- 
mogones are abundantly scattered about the edges of the lobes. The spermatia 
vary in length from goth to auth; the sterigmata consist of cylindrical cells, 
differing in length and breadth. Projecting from among the ordinary spermatifer- 
ous sterigmata occur many elongated, articulated, sterile ones, analogous to those 
of Ramalina. 
Specimen 3.—Dunkerron, Ireland ; coll. by Taytor; in Herb. Mackay, Dublin ; 
with apothecia. The margins of the thallus are ciliate. The spermogones are 
few, and chiefiy old, containing no free spermatia. 
Specimen 4.—ScH@RER exs. 360; trunks of trees, Switzerland. Here the 
spermogones are somewhat exceptional in their characters ; they appear to be old 
and hypertrophied, and contain no free spermatia. They are small, brown, semi- 
translucent, grain-like bodies, dotted thickly about the edge of one or two lobes. 
Specimen 5.—Karin Pass, Kumaon, Himalaya, at an elevation of 7500 feet, 
Dr Hooker; in Herb. Hooker, Kew; with apothecia. The plant closely resembles 
Platysma glaucum. The spermogones are as above described. Jamaica, PurpIE 
(sub nom. P. perforata); avery handsome specimen. Spermogones are large and 
abundant. Teneriffe; rocky parts of Lagura, 1845; BourGrau “PI. Canar.” 
No. 1088 (erroneously labelled P. conspersa). The margins of the thallus are 
ciliate. Teneriffe; common in the woods, 1845. Bourceau, ‘Pl. Canar.” No. 
1098. The spermogones abound about the margins of the lobes. 
Specimen 6.—Canary Islands, ex. Herb. Webbianum; in Herb. Hooker, Kew. 
This is exactly the plant that is imported, under the name of “ Canary Rock 
Moss,” from the Canary Islands into London for the Orchill manufacture. It 
bears no apothecia; centrally it is frequently sorediiferous or isidiiferous; it 
sometimes possesses terminal soredia also. In consistence or texture the thallus 
is leathery and thick; its surface is variously cracked and reticulated. The 
spermogones are abundant and large. 
Specimen 7.—Caribbean Islands, H. SMEATHMAN; Jamaica; both in Herb. British 
Museum. Neither bear apothecia; the latter has a ciliate margin. Both have 
abundant spermogones. These, and most of the specimens above enumerated, are 
referrible to the var. ciliata of P. perlata ; but in none of them is the ciliation of 
the margin so prominent or so constant as in those which follow. 
Specimen 8.—Var. ciliata ; on trees, Castle Bernard, Cork ; coll. CARROLL (sub 
nom. P. perforata). The P. perforata of Hook, “Engl. Flora,” p. 200; of 
VOL. XXII. PART I. 3H 
