NEW LICHENS, 169 
of Borrera exilis, Ach., is white, and it is a more êrect 
species. 
21. P. Hookeri, Tayl. ; thallo aggregato, albo, lineari, sinuato- 
inciso, lobulis pinnatifidis, sinubus subcircularibus, subtus 
atro, pannoso ; gemmis minutis, cinerascentibus, granulatis, 
_ Statim cylindricis, demum in thallum expandentibus ; apo- 
theciis marginalibus, planis, disco rufescenti, margine 
tenui, incurvo, demum gemmifero. 
Has. On bark; St. Vincent's; Rev. L. Guilding, Hook. herb. 
—The compound patch of thalli is rounded. Lobes 
incised as in P. sinuosa, Ach.; yet, not only is the colour 
of the thallus different, but the granulate and evlindsical 
buds are essentially distinctive. 
22. P. inequalis, Tayl.; thallo aggregato, pallide sulphureo, 
inciso-lobato, laciniis linearibus, flexuosis, ramosis, obtuse 
Tugosis, planiusculis, subtus nigrescenti, margine tumenti; 
Bemmis granulatis, confertis, confluentibus; apotheciis 
substipitatis, concavis, extus rugosis, margine demum 
gemmifero. 
Has. Van Diemen’s Land; Mr. Borrer's herb.— Several — 
thalli, each about one inch wide, occur, forming a large | 
- patch on the bark of trees, of a pale yellow colour; lacinie - 
imbricated, often dichotomous. Buds usually centes, Se 
Disks of the apothecia dark brown, their margin: ncurved - 
and crenulate. However tumid the terminations of the 
* laciniæ of the lobes, they are never hollow as in pip 
. Sodes, Ach. ; the ramification and figure of the lobes is more 
3 - like that of P. incurva, Ach. a 
23. p. lamelligera, Tayl.; hallo cæspitoso, compresso, | 
dE glabro, albido-cinereo, subpinnatim dichotomo, laciniis. : 
_Convexiusculis, ultimis brevissimis, obtusis, nigro-ciliatis, - 
Subtus margine albis, centro fixuris nigris devir cto ; 
ginal oan, statim lamelliformibus. - 
M ; Peru; Mathews, Hook. he 
mii inches wide, ne of numerous 
