Dr. W. Nylander on new British Lichens. 103 
ferences: it has the same figure as in O. capensis, but is some- 
what thickened only at the lower margin, whilst the upper part, 
near the suture with the maxillary bone, is deeply excavated, 
so that the suture is even more elevated than the bones be- 
neath it. 
The fossa temporalis resembles that of O. capensis in form, 
and is much more elongated than in O. gladiator ; it is acute in 
front and rounded behind. It is 10 inches long, 4 inches broad 
in the middle; the lower margin is of a sigmoid form, and has 
a stronger protuberance over the region of the ear than in O. 
capensis; but the hinder part of the occiput, corresponding with 
the mastoid process of higher animals, is not so strong as it 
seems to be in U. capensis, and is somewhat shorter. 
The tympanic bones are wanting, and the articular cavity for 
the lower jaw is strongly excavated, with a prominent lower 
margin. 
The number of teeth is twelve in each jaw; each of them is 
situated in a large socket, the first sockets being somewhat 
smaller than the following ones. In front of the first socket, in 
the intermaxillary bone, there is a small and not very deep 
groove, in which there has probably been a small tooth, now 
wanting. The total number of teeth would then have been 
thirteen in the upper jaw. 
Each tooth is of a conical form and somewhat curved, with 
the apex backward, and the anterior margin more perpendicular 
than the somewhat inclined posterior margin. The upper half 
of the crown is whitish, the lower half brown; on the former 
there is a thin layer of enamel, which is wanting on the lower 
brown portion. 
lurateg Lote: Your sincere Friend, 
May 5, 1866. H. BurMEIstTErR. 
XVII.—Notule Lichenologice. No. VIII. 
By the Rev. W. A. Lercuton, B.A., F.L.S. 
NEW BRITISH LICHENS. 
Tue following additions to our British Lichens are made by 
Dr. W. Nylander in the ‘ Flora’ for February 1866, p. 85. 
1. Lecidea chlorotiza, Nyl. 
Thallus cinereo-virescens, tenuis, subleprosus, effusus ; apothecia 
carneo-flavida, convexiuscula vel convexa (latit. 0'-4—-0°6 mil- 
lim.), immarginata (solum juvenilia margine obtuso), intus 
incoloria; spore 8, incolores, oblong vel oblongo-fusi- 
formes, 1-septatz, longit. 0-009-0:012 millim., crass. 0-002- 
