556 LICHENES ANTARCTICI. 
thallus, the terminal flat buds and the central apothecia dis- 
tinguish the present species from R. fraxinea, Ach. 
22. COLLEMA, Ach. 
139. C. nigrum, Ach.; L. U. p. 628. 
Has. New Zealand. 
140. C. tremelloides, Ach.; L. U. p. 655. 
Has. Cape Horn and New Zealand. 
141. C. australe, n. sp.; thallo foliaceo-membranaceo tenui 
atro-olivaceo subpellucido nudo lobis adscendentibus sub- 
imbricatis concaviusculis rotundatis undulatis integerrimis 
subtus pallidioribus subtomentosis, apotheciis elevatis atris 
demum convexis subtus nudis margine tenui integro. 
Has. Cape Horn. 
Thallus very thin, slightly gelatinous, shining when wet 
and of a dark brownish-olive, pale and of a dusky olive green 
when dry. Like those of C. Saturninum, Ach., the apothecia 
are hollow beneath and there destitute of a layer of thallus. 
It differs from that species by being less downy beneath, by 
the want of black powdery buds on the surface, by the thinner 
thallus and black disks of the apothecia. 
142. C. leve, n. sp.; thallo foliaceo membranaceo submo- 
nophyllo orbiculato depresso levi rotundato-lobato lobis 
concavis cochleatis integerrimis, gemmis centralibus granu- 
latis, apotheciis centralibus confertis minutis concavis rufo- 
fuscis margine tumido integro subincurvo. 
Has. New Zealand, on trees. ; 
Allied to C. nigrescens, Ach., but the lobes are thinner, 
smoother, without longitudinal wrinkles, and the apothecia 
in all stages are concave, with a thicker thallodal cup. 
143. C. rugatum, n. sp.; thallo gelatinoso-membranaceo 
elastico subtenaci utrinque cristis confertis longitudinalibus 
undulatis plicato fusco-viridi lobis confertis adscendentibus 
oblongo-rotundatis incisis crenatis concaviusculis, gemmis - 
minutis granulatis stipitatis. | 
Has. New Zealand. On hasels, Mucruss, county of Kerry, | 
Ireland always on trees. ~ 
