28 NATURAL HISTORY OF KERGUELEN ISLAND. 



called "handsomest of the vegetable products of this the island of Des- 

 olation". But this last, though received by Nylander {Neuropogon Tay- 

 lorij Nyl. Syn. i, p. 273), is hardly well discriminated from the older 

 species by the description of either author 5 and I cannot separate any 

 of the numerous specimens before me from others got, during the same 

 voyage, at the Falkland Islands (Herb. Hook.), which Taylor and Ny- 

 lander appear to have referred to V. melaxantha. 



2. Pannaria Taylori, .9^. nov. — Thallo foliaceo cartilagineo appresso 

 luteo-fulvo, lobis apice rotundatis crenatis incisisque, subtus nigris 

 hypothallo obsolescente ; apotheciis (demum plusquam 2 millim. latis) 

 lecanorinis sessilibus, margine crasso niguloso, disco piano fuscescente. 

 Sporss ellipsoidege, simplices, iucolores, 0,016-21°"™ long. 0,009-11™°* 

 crass. — Rocks, Hooker (Herb. Taylor). — Medullary layer of compact, 

 elongated cells. Collogonidia 0,002-5™"* in diameter, solitary or in 

 chains of 2-5. The specimen is rather more than an inch across. It 

 occurs with Flacodium elegans^ but wrapped apart, in Dr. Taylor's col- 

 lection. 



3. Pannaria glaucella, sp. nov. — Thallo foliaceo cartilagineo arete 

 appresso glauco-cinerascente, subtus pallido hypothallo obsoleto, lobis 

 radiantibus subintegris ; , apotheciis (0™™. 006-8 latis) lecanorinis adnatis, 

 margine integro demisso, disco dein couvexo fusco-nigro. Sporge imma- 

 turse. — Rocks. — Specimens scarcely half an inch across. Elongated cells 

 of medullary layer compact. Collogonidia 0,004-9™™ in diameter, in 

 chains often of 4-10. 



4. Placodium elbgans, imfc. D. C. — Rocks, Hoolcer (Herb. Tayl.). — 

 Spores 0,010-17™™ long and 0,007-9™™ thick. QdiWe,^ Lecanora murorum 

 by Dr. Taylor (Herb.), but not reckoned in his Lichenes Antarct. 1. c. 

 It is perhaps better referable as above. 



5. Placodium bicolor, sp. nov. — Thallo crustaceo-adnato rimoso- 

 areolato aurantiaco, cephalodio centrali (6-10™™. lat.) pluribusve de- 

 pressis radiatim rimosis, concoloribus ouusto, ambitu lobato; apotheciis 

 (2-3™™. lat.) sessilibus, disco piano nigro-fusco, margine tenui demisso 

 subintegro. Sporse in thecis uniserialiter octonse, ellipsoideae, polari- 

 biloculares, 0,020-30™™ lat., 0,012-20™™ crass., paraphysibus capillari- 

 bus. — Rocks. — Collogonidia of the cephalodia 0,006-9™™ in diameter, 

 reddish, solitary or in short chains. The name and much of the char- 

 acter of Lecanora dichora, Tayl., 1. c, suggests the present lichen ; but 

 the infertile specimen, called (notwithstanding its orange color) Leca- 

 nora gelida by Taylor (Herb.), appears to me to belong here. ThalJus 

 at length two inches wide. 



