OF FILAMENTOUS, FRUTICULOSE, AND FOLIACEOUS LICHENS. 205 
Rk. glomulifera. The spermogones are smaller than in these species ; they are 
small papille, marked on the apex by a depressed, black, punctiform ostiole. 
They are scattered about the margins of the lobes. The spermatia are about 
amth long and sith broad; the sterigmata are xth to sth long, and agth broad. 
SPECIES 6. A&R. dissecta, Ach. 
Specimen 1.—Casapi, Peru, Marrnews; in Herb. Hooker, Kew; in large 
handsome patches. The spermogones are scattered sparingly about the periphery 
of the lobes, usually as depressed, round, black points. Though generally flat 
or depressed, they sometimes become papilleeform. Occasionally they are sur- 
rounded by a sort of ring of the thallus, well marked. When old, they appear 
frequently as largish black rings or disks, with a stellate-radiate fissure. The 
thallus is sometimes studded over with very irregular black perforations, where 
old spermogones existed, and the bodies or nuclei have fallen out. 
SpEcIES 7. R. corrosa, Ach., 
A native of equatorial America. 
Specimen 1.—(Sub nom. Sticta dissecta, Ach.); from Mr Dickson; in Herb. 
Hooker, Kew. No habitat is given ; but-it would appear to be from Scotland, as 
all Mr Dickson’s other collectanea are Scotch! The spermogones are sometimes 
punctiform, sometimes papilleform : in the former case they are usually de- 
pressed, in the latter they possess a distinct, brown, round ostiole. The body of 
the organ is a large, white, hard kernel, as in all Stictas and Ricasolias. 
Speciges 8. R&. Kunthii, Del. 
Specimen 1.—Organ Mountains, Brazil ; probably coll. by GARDNER; in Herb. 
Hooker, Kew. The spermogones are very abundantly scattered about the 
periphery of the thallus. They are usually round brown spots or points, flat, or 
sometimes depressed ; occasionally surrounded by a paler ring of the thallus, 
which gives them a pseudo-papillate appearance. They are seldom distinctly 
papilleeform. 
Specimen 2.—Chinos, Cordillera (Oaxaca), Mexico, at 7000 to 9000 feet of eleva- 
tion ; coll. by H. Gatzormi, 1840, No. 6895 (sub nom. Sticta fuliginosa) ; in Herb. 
Hooker, Kew. This specimen is closely allied to, if it is not a mere form or 
variety of, 2. herbacea. Its apotheciaand spermogones, spores and spermatia, are 
the same as in that species. 
GENUS III. Parmeia, Ach., Nyl. 
In this large and comprehensive genus the spermogones are chiefly black, 
punctiform, wholly immersed in the thallus, and scattered about the periphery of 
the thallus and on the convexities of the lacinize, where the thallus is divided into 
VOL. XXII. PART I. 3G 
