196 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
margins of the lobes or lacinize; they are punctiform and fiat or depressed, or 
papilleeform—rarely the latter. When papillzeform, they resemble the spermogones 
of Ricasolia herbacea, but are smaller. Sometimes they occur in the old state as 
mere dark maculee. 
Specimen 7.—Var. dichotoma, La Povurr, Mauritius; GarpNeER, in Herb. 
Hooker, Kew. The spermogones are either scattered generally over the surface 
of the thallus, or only on the margins of its lacinia. They are depressed, very 
pale points, and are very apt to be overlooked. 
Specimen 8.—Var. sinuosa, Philippine Islands, Cumine; in Herb. Hooker, Kew. 
The spermogones occur chiefly about the margins of the laciniz ; they are more 
frequently punctiform than papilleform, brown, and in all cases inconspicuous. 
The ostioles of the punctiform spermogones are generally depressed in crater or 
cup-like cavities of the thallus. 
Specimen 9.—Var. quercizans, Jamaica, PurpiE; in Herb. Hooker, Kew. The 
thallus is brownish; hence the spermogones, which are also brownish, are not 
easily seen. They are very small papillae, crowned with brown ostioles of a 
deeper tint than the papille themselves. 
Specimen 10.—Var. Canariensis, Madeira, LowE; on the trunks of Persea 
Canariensis, Canary Islands; Herb. Williamson, Dr Leman, both in Herb. 
Hooker, Kew. The spermogones are scattered chiefly about the ends of the lobes 
or laciniz. They resemble those of Ricasolia herbacea, being papilleeform ; the 
apices of the papillz are sometimes flattened, seldom depressed. 
Specimen 11.—Var. rufa, Ecuador, SrrmMann; in Herb. Hooker, Kew. The 
spermogones are here scattered chiefly about the periphery of the thallus; they 
are papilleeform, and resemble those of Ricasolia herbacea, but are small, and not 
so prominent. 
Specigs 6. S. argyracea, Del., 
Which occurs in America, Java, Cochin-China, Polynesia, and Australia. 
Specimen 1.— Pacific Islands, Stnciarr; Philippine Islands, Cumine ; Martinique, 
Juan Fernandez, 1830; Madras, Dr WieuT; all in Herb. Hooker, Kew. The sper- 
mogones are few, scattered, papilleeform, resembling those of Ricasolia herbacea, 
but are smaller and less prominent. 
Species 7. S. nitida Tayl., 
(Syn. S. flabellata Mont.) 
Specimen 1.—Chili, Lops; in Herb. Hooker, Kew. This is a narrow-lobed 
species, somewhat resembling S. damecornis. The spermogones are papilleeform 
or punctiform, scattered chiefly about the ends of the lobes. The papillzeform 
spermogones are frequently flattened on the apex ; the punctiform ones are black 
or brown, sometimes depressed, or surrounded by a thalline ring. In age they 

