OF FILAMENTOUS, FRUTICULOSE, AND FOLIACEOUS LICHENS. 199 
TayL.), in the Herbarium, Royal Botanic Garden, Edinburgh, is of enormous 
size,—at least 1 foot in diameter. The spermogones are punctiform and immersed 
wholly ; they are either seated on the rugze, or scattered over the general surface 
of the lacinize towards their ends. 
Specimen 3.—Brazil, in Herb. Hooker, Kew (also sub nom. S. impressa, TAYL.). 
The spermogones are very distinct, punctiform, and depressed, dotting over the 
here very prominent rugze. Another specimen in Herb. Hooker (habitat not 
given), has spermogones irregularly scattered over the whole surface of the thallus, 
sometimes papilleeform, sometimes punctiform; in the latter case usually fiat, 
seldom depressed. 
Species 14. §. orygmea, Ach., 
Which occurs in equatorial America, Australia, and the Antarctic Regions. 
Specimen 1.—Lord Auckland Islands, Antarctic Expedition 1839-43, Dr 
Hooker. The spermogones are either papilleeform or punctiform; more fre- 
quently the latter. In the punctiform state, they resemble those of S. pulmonacea, 
but are larger and more distinct. They are scattered chiefly on the ruge of the 
thallus, and are very abundant. The spermatia are rod-shaped and about aath 
long; the arthrosterigmata have the usual characters of the genus Stzcta. The 
body of the spermogone is a whitish, dense, hard kernel, easily enucleated, as is 
generally the case in the spermogones of Sticta. 
Specimen 2.-Chiloe, Cumine; in Herb. Hooker, Kew. The spermogones are 
abundant about the edges of the lobes; they are minute black points, generally 
slightly depressed. Sometimes they are papillaeform, or the ostioles have a slight 
ring of thallus surrounding them. 
Species 15. S. flavicans, Hook. fils., and Tayl. 
I have great doubt as to this being properly a separate species; but I am not 
prepared to say to what species it is best referrible. 
Specimen 1.—Falkland Islands, Antarctic Expedition, 1839-43, Dr Hooxer. 
This is a large and handsome species, with abundant and very distinct spermo- 
gones. ‘These organs are usually punctiform and depressed, minute, black or 
brown round spots. Sometimes they are surrounded by a sub-prominent thalline 
margin; sometimes they are seated on distinct, thalline papillze, and the spermo- 
gones have then the aspect of those of Ricasolia herbacea. From the beautiful 
yellow colour of the thallus, the spermogones of this species are among the most 
distinct of those in the genus Sticta. The ostiole is generally not perceptible ; 
sometimes it is distinct in the centre of each of the brown or black round spots 
above referred to, as a round or stellate-fissured perforation. 
Specimen 2.—Hermite Island, Cape Horn, Antarctic Expedition, 1839-43, Dr 
Hooker; no apothecia. The spermogones are usually sub-papilleeform, scattered 
