200 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
sometimes over the whole surface of the thallus, sometimes over the margins of 
the lobes only. They are flattened and not prominent, the ostiole is almost 
always depressed. The body of the spermogone is a hard white kernel, easily 
enucleated. The spermatia are about smth long; the sterigmata are those of S. 
pulmonacea. 
Species 16. S. D’Urvillei, Del., 
Which occurs in equatorial America, and in New Zealand. 
Specimen 1.—Chili, Lops; in Herb. Hooker, Kew. ‘This plant seems identical 
with S. flavicans, Hook. ; and its spermogones are precisely similar. 
Species 17. S. endochrysa, Del. 
Specimen 1.—Andes, Lops; in Herb. Hooker, Kew. The spermogones are 
scattered near the periphery of the thallus; they are largish, brown, round spots, 
flat, or on the apex of slightly elevated thalline papillee. 
Species 18, S. gilva, Ach. 
Specimen 1.—Juan Fernandez; in Herb. Hooker, Kew. The spermogones are 
flat, punctiform, brown, scattered over the surface of the lobes of the thallus. 
Specimen 2.—Rocks, sea-side, Uitenhage, Cape of Good Hope (sub nom. S. 
crocata, Ach., var. 8. gilva, Ach.) The spermogones are scattered about the ends 
of the lobes; they are black or brown minute points, generally flat, sometimes 
papilleeform. 
SPECIES 19. S. aurata, Ach., 
Which has a wide geographical distribution, being found in India, America, Africa, 
Asia, Polynesia, and Australia. 
Speciinen 1.—Coll. Salwey ; in Herb. Hooker, Kew. Supposed to be an English 
specimen ; but no habitat is given! The thallus bears no apothecia; but old-and 
degenerate spermogones occur as minute, irregular, brown dots scattered abun- 
dantly about the periphery of the lobes. 
Specimen 2.—On trees, Minas-Geriies, Brazil, 1840; on trees, at an elevation 
of 7500 feet on the Cordillera, Oaxaca, Mexico; coll. H. Ga.eotti, 1840; both in 
Herb. Hooker, Kew. The spermogones are old and degenerate chiefly; they 
occur as largish black disks or rings; flat, seldom sub-papilleeform or depressed ; 
sometimes maculiform. 
Specimen 3.—Norfolk Island, Fr. THompson; in Herb. Hooker, Kew. The 
thallus is very handsome; about 1 foot in diameter, of a beautiful lake-colour. 
The spermogones are abundant, large, papilleeform, frequently with a deeper 
coloured ring or macula surrounding them. In another specimen, also in Herb. 
Hooker, from New Holland, both apothecia and spermogones are abundant. 

