(161) 
which included it, being, ‘expressis verbis, a collective name, largely 
relating (at least in Summ. Veg. Scand. ; as also in Ach. Syn., teste Nyl.) 
to B. cyrtella. B. globulosa appears to be represented by a lichen occur- 
ring on dead wood in the White Mountains, well comparable externally, 
and in the rather elongated, bilocular spores, with the lower, right hand 
specimen of Moug. & Nestl. n. 13830. In another, also inhabiting dead 
wood, and hemlock bark in the same region, and finally resembling Zw. 
exs. n. 89, the apothecia are however originally paler than in any of my 
foreign specimens, and the spores, as in the last preceding species, more 
commonly simple. Compare as to this Nyl. Lich. Scand. p. 202.—— 
B. miliaris (Wallr.) (Scutula Wallrothii, Tul. Lecid. anomala, v. Wall- 
rothii, Nyl.) a rare parasite,of the thallus of Peltigera canina, has been 
detected, in this country, only (in southern Massachusetts) by Mr. Willey. 
——B. denigrata, Fr., is peculiar to dead wood, and has occurred to me in 
Cambridge, with a darker thallus however than even that of Rabenh. Lich. 
Eur. n. 626. Itis comparable with B. uliginosa, but the spores (exactly 
agreeing, in my specimens, with those of Fr. Lich. Suec. ». 98) are typi- 
cally bilocular. B. cumlata (Sommerf.) a well-marked lichen of arctic 
Europe (Th. Fr. Lich. Arct. p. 187, & Lich. exs. n. 44) which most authors 
have referred to Lecidea, Fr., is also an inhabitant of Greenland (J. Vahl, 
e Th. Fr. 1. c.)._——B. mixta, Fr., is determined by the published lichen 
(Lich. Suec. n. 40) and can scarcely be supplanted by the indeterminable 
Lichen Grifithii, Sm., two out of three of Borrer’s specimens of which, 
given to me in 1841, possess the spores of Rabenh. Lich. Eur. n. 627, repre- 
senting the very similar small condition of B. atropurpurea which Scherer 
published. B. mixta is confined to trunks, occurring on Maple in Vermont. 
(Mr. Frost) and on Firs, inthe upper forest of the White Mountains (Myself) 
as in Lower Canada (Mr. A. T. Drummond) and, on various trees, in Massa- 
chusetts (Mr. Willey).——This lichen has been sent also, in fine condi- 
tion, but offering some peculiarities, from California (Mr. Bolander).—— 
B. atropurpurea (Massal.) though sometimes closely resembling the last, 
with which it was often united by the elder lichenists, is a more conspic- 
uous lichen, and easily distinguished by its larger, ellipsoid spores, which 
are at length regularly bilocular. The dark-brownish, flattish state 
(Lecidea Grifithii, Borr. pr. p.) has occurred, on Hemlock, in Vermont 
(Mr. Frost) and Massachusetts (Mr. Willey) as on other bark in Alabama 
(Mr. Beaumont). But the apothecia soon blacken; and such a condition, 
becoming also commonly convex (Vermont, on Maple, Mr. Frost; and 
not uncommon elsewhere in New England, and in New York, as also in 
California (Mr. Bolander) and Russian America (Dr. Kellogg) is some- 
times far from unlike Lecidea enteroleuca.’ I observe, very rarely, tri- 
1 B. melaleuca, Tuckerm. herb. (Nyl. in Prodr. Fl. N. Gran. p. 56, not.) col- 
lected, too scantily, in the island of Cuba by Mr. Wright, is comparable at once 
both with B. atropurpurea, to the neighbourhood of which Nylander has referred 
21 
