78 
CONSPECTUS OF THE GENERA OF BRITISH LICHENS. 
Tribe XXIII. Pyrenocarpei 
Series YI. 
PlEENODEI. 
Tribe XXIY. Peridiei ... 
L 
^Normandina, Xjl. 
Endocarpon, Hedw., Nyl. 
Verrucina, Xyl. 
Verrncaria, Pers., Xyl. 
Thelenella, Xyl. 
1 Thelopsis, Xyl. 
Obryzum, Wallr. 
Strigula, Fr. 
Melanotbeca, Fee. 
^(Astrotbelium, Eschw .) 
^Thelocarpon, Xyl. 
j Eimularia, Xyl. 
j Endococcus, Xyl. 
(. Mycoporum, Flot. 
(Family lY. — Myriangiacei.) 
Tribe I. Myriangiei . . . Myriangium, Mnt. & Berk. 
It will be perceived that the above Conspectus has been drawn 
up in the same form as that given hy Nylander in the Introduction 
to his Syn. Licli. and Lick. Scand., which is admirably suited to 
show the arrangement at a single glance. The classification thus 
proposed will be found, I think, on due examination, to be the most 
philosophical and natural of any yet propounded. The suh- 
division of these genera into “ subgenera” and “ sections,” some 
emendations upon which have also been indicated by Nylander in 
the Flora, &c., will be found in detail in my forthcoming “ Cata- 
logue of British Lichens, including those in Herb, Brit. Mus.” 
ATLAS HER DIATOMACEEN-KUNDE. 
Parts IX. and X. 
We have received the above parts of the ‘‘Atlas.” Some delay 
has arisen in their publication, partly arising, we believe, from the 
ill-health of the author. Part IX. and one plate of Part X. con- 
tain the following figures of species belonging to the genera 
Aulacodiscus : — 
Aulacodiscus scaber, Ralfs. 
,, decorus, Greville (?) var. 
,, Sollittianus, Norman. 
„ Molleri, Grunow, n. sp. 
„ Orientalis, Greville. 
,, Oreganus, Bailey. 
,, (?) amcenus, var. Greville. 
,, (?) angulatus, Greville. 
,, ■ affinis, Grunow, n. sp. 
„ Stoschii, Janisch, n. sp. 
„ Petersii, Ehr. var (?J. 
„ „ type nach, Kitton. ' 
