198 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
genus Sticta or Ricasolia. They are large papille, or cones of the thallus, paler 
than the surrounding surface ; sometimes confluent, and then becoming irregular 
tubercles. The cones are usually crowned by a brown apex, varying greatly in size, 
but resembling the disk of an apothecium. The ostiole is sometimes visible in the 
centre of this brown apical spot. The spermogones are scattered over the whole 
surface of the thallus, and bear a close resemblance to nascent apothecia. Inter- 
spersed among the spermogones are numerous small, round, soredic warts. The 
spermatia are about zath long, rod-shaped, with a breadth of sinth; on the usual 
arthrosterigmata of Sticta. In connection with NyLANDER’s division into Sticta 
and Ficasolia, according as the spermogones are punctiform or papilleeform, it is 
note-worthy here, that the papilleeform or mammillar spermogones are larger than 
in any species of /zcasolia I have yet met with! 
Species 12. 9S. xanthosticta, Pers. 
(Syn. lutescens, TAYL.); a species allied to S. jilicina, which is found in Ame- 
rica, the Canary Islands, and Java. 
Specimen 1.—Jamaica, Purpie; in Herb. Hooker, Kew. The spermogones 
are very minute, brown papillee, scarcely discernible even under the lens. 
Species 13. S. carpoloma, Del. 
(Syn. S. impressa, TAYL.); a species which inhabits equatorial America, Poly- 
nesia, and Java. ‘This isa very large and handsome species, having a pale- 
coloured thallus; hence the spermogones are usually more or less distinct 
and easily seen. 
Specimen 1.—New Zealand, Antarctic Expedition, 1839-43, Dr Hooxer, Kew. 
The surface of the thallus is smoothish; its under surface fibrillose and pale- 
coloured ; the apothecia marginal. The margins of the thalline lobes or laciniz 
are studded over with irregular cushion-like warts, which are soredic, and have 
no connection either with apothecia or spermogones. The spermogones are either 
papilleeform or punctiform ; when the former, they are chiefly scattered about 
the margins of the lobes; when the latter, they are either distributed over the 
whole surface of the thallus, or confined to the rug, with which it is marked, as 
in S. pulmonacea. When seated on the rugze, they are frequently disposed in a 
linear series; they are then usually brown and depressed, resembling the pricks 
of a needle-point. The thallus is sometimes somewhat raised round the ostiole, 
to which it gives the appearance of being girt by a ring or border. Tay or’s 
name, 7mpressa, was probably given in allusion to the punctiform, depressed 
Spermogones so abundantly scattered over the ruge. The spermatia are rod- 
shaped, and about ath long., The sterigmata consist of short, thick-walled, 
cubical cellules, precisely as in S. pulmonacea. 
Specimen 2.—Another specimen from New Zealand (sub nom. S. dmpressa, 

