( 233 ) 
one from Cladonia, we are to regard it as excluding the new type from the 
Spherophorei, is perhaps no more distinguishable from the thallus of 
Spherophorus, than is already that of Acroscyphus. The plant should 
be sought for, on the branches of firs, in arctic America; and may not 
impossibly prove also to occur in alpine districts further southward. I 
owe my excellent Norwegian specimen to my friend Mr. C. F. Austin, who 
received it from a correspondent at Christiana. 
Fam. 2.—CALICIEI. 
Thallus crustaceus, aut effiguratus, aut uniformis. 
LVIII.—ACOLIUM, (Fée) De Not. 
De Not. in Giorn. Bot. Ital. (1847) cit. Mass. Mass. Mem. p. 149 (excl. 
A. saxatili). Koerb. Syst. p. 302; Parerg. p. 283. Arn. Lich. Frank. 
Jur. in Flora, 1860, p. 80. Anz. Cat. Sondr. p. 98. Mudd Brit. Lich. 
p. 253. Stizenb. Beitr.1.c.p.158. Tuckerm. Lich. Calif. p.27; Lich. 
Hawai. in Proceed. Amer. Acad. 7, p. 232. Calicii spp., Ach. L. U. 
pp. 39, 232, t. 3, f.1.; Syn. p. 55. Turn. & Borr. Lich. Brit. p. 182. 
Fr. 8. 0. V. p. 276; L. E.p. 400. Scher. Spicil, p.226; Enum. p. 163. 
Mont. Apergu Morph. p.11; M. & V.d. Bosch Lich. Jav. p.55. Cyphe- 
lium pro min. p., Ach. in Act. Holm. 1815, p. 261. Th. Fr. in Vet. Ak. 
Forhandl. 1856, p. 128; Lich. Arct. p.244; Gen. p.101. Acolium pr. 
min. p., Fée Ess. p. 28, t. 3, £15; Suppl. p. 145. Trachylie spp., Fr. 
FI. Scan. p. 282; Summ. Veg. Scand. p. 118. Tuckerm. Syn. N. Eng. 
p- 77; Obs. Lich. 1. c. 5, p. 390; 6, p. 263. Norm. Con. p. 26. Nyl. 
Monogr. Calic.p.28; Prodr. p.27. Trachylia, Pyrgillus, & Tylophoron, 
Nyl. Syn. p. 164, t. 5,f.29-36; in Prodr. Fl. N. Gran. p.6; Syn. Lich. N. 
Caled. p. 8. 
Structuram exposuit Tulasne Mém. sur les Lich. p. 80. 
Apothecia crateriformia, rarius urceoliformia, sessilia, excipulo 
proprio nigro 1. nudol. a thallino accessorio marginato. Spore e 
thecis cylindraceis mox ejecta, spherice ellipsoidezeve, 1. simplices 1. 
bi-quadriloculares, 1. dein muriformi-pluriloculares, fuscescentes. 
Spermatia ellipsoidea oblongave, rarius bacillaria 1. acicularia; ster- 
igmatibussimpliciusculis. Thallus crustaceus, uniformis 1. subsquam- 
ulosus 1. rarissime effiguratus 1. in parasiticis nullus. 
The general view here taken of the position and significance of this 
genus has been already intimated. It furnishes the highest types of 
Calicieine structure; and rises into forms with which even Acroscyphus, 
30 
