OF FILAMENTOUS, FRUTICULOSE, AND FOLIACEOUS LICHENS. 109 
ing memoir, the names of genera and species used by Dr NyLanpEr, in what are 
both the most recent, and at the same time most accurate and philosophical, con- 
tinental works in lichenology.* Ido this the more readily, inasmuch as I have 
not yet elaborated the classification and nomenclature I mean to follow in my 
forthcoming ‘‘ Synopsis of the British Lichens.’”—(Brapsury and Evans, London. ) 
For usefulness of reference to the reader, I beg to append a vidimus of NyLan- 
DER’S arrangement,} so far as it contains genera and species, whose spermogones 
and pycnides are described in the following Memoir. The genera and families, 
however, will not be found arranged in the order laid down by NyLanper. Ihave 
begun with the higher lichens; and I have been guided in the arrangement or 
sequence of the families and genera more by the similarity of their spermogones, 
than by general anatomical affinities. It is obviously, however, a matter of no 
moment how the families and genera follow each other, or are arranged. The 
point of real importance is, that the spermogones in each family, genus, and 
species, be fully and distinctly described. 
Famizy I. Collemacei. Genera. 
: spt Ephebe, Fr. 
Tribe 1. Lichina, . . . { gee ne 
Synalissa, DR. 
Omphalaria, DR. 
Tribe 2. Collemei, . . . Collema, Ach. 
Leptogium, Fr. 
Obryzum, Wallr. 
Famizy II. Myriangiaeei. 
Tribe t. Myrianget, . . Myriangium, Mont. and Berk, 
Famity III. Lichenacei. 
Sphinctrina, Fr. 
‘ nilulind Calicium, Ach. 
Tribe 1. Caliciee, . . . Coniousbeyicke 
Series I, Epiconiodei, . . Trachylia, Fr. 
2 ; Spherophoron, Pers. 
Tribe 2. Spherophorei, . { (eos, ee 
Tribe 3. Baomycei, . . Beomyces, Pers. 
Series II. Cladoniodei, . . ( Tribe 4. Cladone,. . . Cladonia, Hoffm. 
Tribe 5. Stereocaulei, . . Stereocaulon, Schreb. 
Tribe 6. Roccellet, . . . Roccella, Bauh. 
Series III. Ramalodei, . 
Tribe 7. Siphulei, { uphaila, Fr, 
Thamnolia, Ach. 
* His “ Synopsis Methodica Lichenum,” and his “ Enumeration Générale des Lichens,’”’ both 
published in 1858. 
} As given in his “ Synopsis,” p. 65. 
VOL. XXII. PART I. 2F 
