(188 ) 
in G. carneo-lutea, G. exanthematica, and finally in G. protuberans and 
G. rhexoblephara, is far from strange to Urceolaria ; which exhibits a 
now deeply-cleft, though finally, as in other species, obtuse margin in 
U. chloroleuca of. the present writer (Wright Lich. Cub. n. 123). 
The range of Gyalecta is decidedly northern. Of the twenty-five de- 
scribed species, four-fifths are European. G. lutea extends into, and is 
common in the tropical countries, where G. pineti also occurs, at least in 
Cuba; and several species are peculiar to these regions. It is perhaps 
not surprising that Lichens generally so minute, should have in great 
measure escaped attention here; but a very considerable part of the 
European forms are but recent acquisitions.——G. lutea (Dicks.) Tuck- 
erm. Lich. Hawai., is not rare in New England, and southward I have it 
from Alabama (Mr. Beaumont). It extends also to the tropics (Wright 
Lich, Cub. n. 177).——G. pineti (Schrad.) less observable, has occurred 
in Vermont (Mr. Frost) in Massachusetts (Mr. Willey) in New York 
(Herb. Ravenel) and in New Jersey (Mr. Austin)——G. absconsa, Tuck- 
erm. Obs. Lich. 1. ¢., is only known as yet from South Carolina (Mr. Rav- 
enel).——G. corticola (Lénnr.) (Secoliga fagicola, Hepp in Koerb. Parerg., 
G. ceratina, Tuckerm. 1. c.) exceedingly like G. cornea (Biat. carneola, 
Auctt.) but at once distinguished by the spores, is probably not uncom- 
mon, but most easily escapes notice. It has occurred as yet only at 
Amherst, on Elm and Ash (Myself) and at Weymouth, on Red Cedar (Mr. 
Willey)——G@. Flotovii, Koerb., also well distinguished by the spores, 
and found in Amherst, on Elm, is probably not rare, but overlooked.— 
The arctic G. rhexoblephara (Nyl.) discovered, by J. Vahl, in Greenland 
(Th. Fr. Lich. Arct. p. 205) was found also, in islands of Behring’s Straits, 
by Mr. Wright. 
XXXIV.—URCEOLARIA, (Ach.) Flot. 
Flot. Lich. Sil. cit. Th. Fr. Nyl. Prodr. p. 95; Lich. Scand. p. 176. Sti- 
zenb. Beitr. 1. c. p. 168. Parmelia sect. Urceolaria (P. lepad. excl.) 
Fr. L. E. p. 190. Urceolariz spp., Gyalectz sp., et Verrucarie sp., 
Ach. L. U. pp. 51, 74; Syn. p. 10. Diploschistes, Norm. Con. p. 20. 
Urceolaria max. p., et Limboria (saltem pr. p.) Mass. Ric. pp. 33, 155. 
Urceolaria, et Limboria (saltem p. p.) Koerb. Syst. pp. 168, 376. 
Structuram exposuit Tulasne, Mém. sur les Lich. p. 155, t. 4, f. 
1-14, 5, f. 1-4. 
Apothecia urceolato-scutelleformia; excipulo proprio atro con- 
nivente, dein seepius explanato, discum nigrum margine, a thallino 
lecanorino (rarissime obsoleto) demum discreto, cingente. Spore 
ovoideo-ellipsoidex, muriformi-pluriloculares, fuscee. Spermatia ob- 
longa 1. bacillaria; sterigmatibus sub-simplicibus. Thallus crusta- 
ceus, uniformis. 
