160 TASMANIAN LICHENS. 



Genus I. Nephroma, Ach. p. parte. 

 Thallus with cortical layer continued on under surface, and 

 there without nerves ; colour above ochroleucous or pallescent, 

 underneath j^aler or whitish or nigricant. G-onidial stratum, 

 containing true gonidia. Apothecia rufous or fuscescent. 



1. N'. australe. Rich., albido pallescent or stramineo palles- 

 cent, passim pallidi rufescent, 3 to 4 inches broad, smooth, 

 lobatolaciniate, margin sinuate, underneath whitish or whitish- 

 straw colour, glabrous, smooth. Aj^otheciarufo-fuscescent or 

 fuscous, rotuudate or somewhat broader, 4 mm. broad. Sj)ores 

 fuscescent, fusiformi, oblong, -015 to '021 x -006 to '008 mm. 



Hab. Cheshunt, Archer, Mount Wellington, Hooker, Hook. 

 !F1. Tasm. Probably these specimens belong to the following 

 species. 



2. iV. antarcticum, Jacquin, stramineous or glaucescenti 

 stramineous, large or smaller, lobato laciniate, margin undu- 

 late or crenate, above lacunoso or foveolato impressed, under- 

 neath buUate, smooth, albid. Apothecia rufo-fuscous or rufous, 

 reniform, broad, back of thalline recej^tacle rugose. Spores 

 fuscous, oblong, -02 to -024 x -006 to -008 mm. 



Hab. on bark of trees. Mount Wellington ; Circular Head, 

 Weymouth. iJistinguishf d as a species by the upper surface 

 foveolato impressed, and the lower buUate and whitish. 



2. Nephromium, Nyl. 



Like the preceding, but more fragile ; colour lurid, glauces- 

 cent or fuscescent or rarely pallid. Gonimic stratum of 

 granula gonima generally moniliformi concatenated. 



1. N. Icevigatum, Ach. z^^arr. j^tzj^r^'r*??/;;/, Hffm., lurido fusces- 

 cent or glaucescent, thin, not large, orbicular, rotundato lobate, 

 margin sinuato crenate, opaque, scarcely shining, beneath pale, 

 glabrous and slightly rugulose. Apothecia fusco-rufous, 

 margin of I'eceptacle crenulato unequal, back of receptacle 

 minutely depresso granulate. Spores fuscescent, fusiformi, 

 oblong, 3 septate. 



Hab. on branches of trees. St. Maiy's Pass. 



2. N. celliilosuin, Ach., livido castaneous or castaneo fusces- 

 cent, diam. 4 inches, reticulato foveolate or lacunose lobate, 

 below white or whitish pallescent, bullato unequal, glabrous. 

 Apothecia rufous, to more than \ inch broad, receptacular 

 margin scarcely exceeding disk, and entire. Spores fusces- 

 cent, 3 septate, -OiG to '019 x -006 to -007 mm. 



Hab. on trees, Johnny's Creek, Oldfield, Cheshunt, Archer^ 

 Mount Wellington, Hook. PI. Tasm.; Nyl.j Mount Wellington, 

 and Wey7nouth. 



