194 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
founded. But the lacerate-stellate border, gradually enlarging so as to show the 
disk, and their greater size will distinguish the latter. 
Speciges 4. S. jfilicina, Ach., 
A native of equatorial America, New Zealand, and Java. Its var. Menziesi, Hook. 
fils, occurs in New Zealand, the Antarctic Regions, and Nepal (syn. Sticta Men- 
ziesit, Tayl., in Dr Hooxer’s “ Flora of New Zealand’). In specimens, in Herb. 
Hooker, Kew, the spermogones are with difficulty discernable. The ostiole is 
generally depressed in the centre of crater, or cup-shaped cavities of the thallus, 
or of papilleeform elevations thereof. Sometimes the ostiole is black and puncti- 
form, more frequently it is so pale that it is very apt to be overlooked. 
Species 5. S. damecornis, Ach., 
Which occurs in Ireland, America, the African Islands, and Australia. This 
species is most variable, and it includes a number of well-marked or important 
varieties, of which may be mentioned :— 
Var. linearis, Nyl., Polynesia. 
, macrophylla, Hook., Ireland; African Islands; Java. 
rufa, Ach., Mexico. 
dichotoma, Del., African Islands; Java. 
sinuosa, Pers., Equatorial America; Philippine Islands. 
»  quercizans, Ach., America and Central Asia. 
Canariensis, Nyl., Madeira. 
ee 1.—Feejee Islands; high grounds; on trees, abundant; MILNE, 
H. M. S. Herald, 1855; in Herb. Hooker, Kew. Both apothecia and spermogones 
are marginal. The latter are usually brown warts, not very prominent, flattened, 
often grouped two or three near each other, varying in size. Sometimes, there is 
merely a brown spot, marked centrally by a depressed ostiole of irregular shape 
and size. 
Specimen 2.—Var. linearis, Nyl., Tasmania; Antarctic Expedition, 1839-48, 
Dr Hooker. This plant is extremely like S. pulmonacea, except that its laciniz 
are much more narrow and delicate. The apothecia are marginal, and, as well as 
the spermogones, are quite those of the species just named. The thallus is fur- 
nished below with short brown fibres in rigid tufts, as is frequently the case also 
in S. pulmonacea. The spermogones are abundant, minute, brown depressed 
points, distinctly visible under the lens, scattered along the margins of the 
lacinize, as well as on the rugee of the thallus. The body of the organ is large, 
white, hard, and easily enucleated. 
Specimen 3.—Var. macrophylla. This a bad name for a very variable form. 
Though in many cases the lobes are broad and round, and the plant bears the 
same relation to S. damecornis that S. linita does to S. pulmonacea ; yet in many 

