524 DR. LINDSAY ON NEW-ZEALAND LICHENS. 
b. Var. linearis, Sw. (Fig. 19.) Merely a long, filiform, usneiform condition, In 
Mexican specimens in herbarium Kew, the apothecia are lateral, distributed mostly at 
the angles of the laciniæ, as in the geniculate forms of calicaris in Otago. Spores 
(fig. 19) somewhat more elongated than in their usual condition in calicaris ; simple, and 
herein deviating from the typical or common condition, though sometimes with faint traces 
of a central septum; oblong-ellipsoid, straight or curved, -0005” long, "00016" broad, 
colourless. 
Sp. 2. R. scoputorum, Ach. (Fig. 20. [Linds. Spermog. 128, plate v. figs. 18, 14.] 
1. Chatham Islands (Travers, jun.), sent me by Dr. Müller, Melbourne, 1865 ; in fruit, 
but apothecia in great part degenerate and difform. 
Spores colourless, 1-septate, -0004 long, :0002" broad; but variable as to size and 
form, oval or oblong, straight (a) or slightly curved (5) (seldom so), sometimes subpyri- 
form, occasionally with a constriction opposite the septum, and (according as the upper 
segment of the spore is of equal size with or shorter and broader than the lower) figure 
8-shaped or soleæform (c). Thecæ 8-spored, ‘0024 long, ‘0004’ broad.  Paraphyses 
subdiserete, united at tips, which are sometimes obscured by brownish-yellow granular 
colouring-matter. Hymenium blue with iodine. Normal apothecia with a pale flesh- 
coloured disk. In degenerate apothecia, which are irregularly tuberculiform, and are of 
the same colour as the thallus, the hymenium has lost its ordinary characters, exhi- 
biting no spores, no blue reaction with iodine, and consisting of an indistinguishable 
closely aggregated mass of degenerate paraphyses and thecæ; or it has been entirely 
destroyed or lost, only a hardened horny hypothecium remaining. Thallus generally of 
pale lemon-yellow colour (as in New-Zealand forms of calicaris), generally subcompressed, 
and terebrate or fenestrate to various degrees—a character which seems common ío the 
New-Zealand Ramaline. Occasionally its segments are subterete, in which case the 
plant closely resembles Jersey specimens in my herbarium. 
2. Var. sepiacea, Pers. (Fig. 21.) In herbarium Kew (sub nom. R. terebrata, Tayl, 
and R. verrucosa, Tayl): Cape Horn, Falkland Islands, and Hermite Island, on granite 
rocks far from the sea (Dr. Hooker, Antarct. Exped.). 
Spores oblong-ellipsoid, l-septate, colourless, about “0005” to ‘0006 long, but van 
ble as to size. Apothecia abundant, scattered especially about the tips of the thalline 
segments, which are canaliculate and narrow, or broad, flat, and terebrate ‚or fenes 
trate, sometimes 8-10 inches long. 
Genus X. UsNEA. (Plate LXI.) 
Sp. 1. U. BarBara, Fr. [Linds. Spermog. 123.] 
a. Corticolous. On forest-trees, especially when old, decaying, or dead; Lower ” x 
Saddle-hill, Otago: W. L. L. : in fruit. On scrub in the forests of Coromandel, provin 
of Auckland; abundant, and in fruit: W. L. L. On species of Fagus, where er 
become dwarfish and disappear, on the mountains of Nelson at an elevation of abou 
4400 to 4700 feet. 
b. Saxicolous. On gneiss, Gabriel’s Gully, Tuapeka, Otago: W. L. L.: sterile. 
r busb; 
