507, 73 
M4Me3 
JANUARY 1 19to: Vou. I, pp. 37-40. 
PROCEEDINGS 
OF THE 
THOREAU MUSEUM OF NATURAL HISTORY. 
MIDDLESEX, SCHOOL, 
CONCORD, MASSACHUSETTS. 
THE 
FOLIACEOUS AND FRUTICOSE LICHENS 
OF 
CONCORD, MASSACHUSETTS, 
With Keys to all New England Species. 
BY R. HEBER HOWE, JR. 
(Continued. ) 
GENUS: COELOCAULON Link. 
Cortex terete, medulla arachnoid, axis hollow. Apothecia entire, 
disk dark. Asci clavate, 8 spores. Spores ellipsoid, monoblast, hyaline. 
Me. N. H. Vt. Mass. R. I. Conn, 
Coelocaulon aculeatum (Schreb.) Link. © — + 
GENUS: CETRARIA Ach. 
Cortex bifacial, medulla arachnoid, axis arachnoid. Apothecia sub- 
crenulate or entire, disk dark. Asci clavate, 8spored. Spores ellipsoid, 
monoblast, hyaline. 
Me. N. H. Vt. Mass. R. I. Conn. 
Cetraria islandica (L.) Ach. othe 
islandica v. crispa Ach. 5 ee ee 
hiascens Th. Fr. t+ 
cucullata (Bell.) Ach. Sea 
nivalis (L.) Ach. ee 
TRIBE: ALECTORIEAE Hue 
Cortical structure simple (hyphae longitudinal to axis), medulla arach- 
noid. 
GENUS, ALECTORIA Ach. pro parte 
Cortex terete or subterete, medulla arachnoid, axis arachnoid or 
EF 
Q7 
ot 
