LE a eee ee ee ee 
3 
a: 
a 
ae 
1 
By 
2 
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Dr. Th. M. Fries on new Species of Lichens. 25 
joined by a notch and ledge to the second pair of antenne, and, 
together with the latter, joined to the eye-margins, whereby a 
kind of imperfect sucking-cup is formed. In Caligini, on the 
other hand, the basal joint of the first pair of antennee coalesces 
with the sucking-cup, now developing a pair of independent 
small suckers (Caligus), and now forntie the so-called lamina 
frontalis. A vestige of the true front plate is, however, some- 
times to be observed, namely the scar indicating the place of 
insertion of the detached organ of fixation. 
EXPLANATION OF PLATE I. 
Fig. 1. Head of Spheroma balticum, n., from beneath. 
Fig. 2 a. Head of Serolis Orbignyana, M.-E., from beneath : 0, sockets of 
first pair of legs. 
Fig. 2b. Prosternum and sphenoid plate of the same, from beneath, with 
the lingua and the maxille of the first and second pairs on the 
right side : 0, sockets of maxillipeds. 
Fig. 3. Head of Cirolana borealis, Lilljeb., from beneath. 
Fig. 4a. Head of 4%ga psora, L., from beneath. 
Fig. 46. The maxillipeds of the same in their connexion with other 
ial ce, cardo of maxillipeds; s, stem of ditto; p, palpus of 
itto. 
« 
Fig.4c. Right mandible of the same, seen from the inner side: s, the 
stem; m, the lobe; p, the palp. 
Fig. 5. Head of An:locra Leachit, Ky., doin beneath. 
Fig. 6a. Head of Cymothoa estrum, E., 2, from beneath. The maxilli- 
eds are removed and the sucking-orifice distended: 0, sockets 
of the maxillipeds. 
Fig. 66. Right mandible of the same, from the inner side: s, stem ; 
m, lobe; p, palpus. 
In all the figures, where no other interpretation is given, the following 
is the signification of the letters :—/, forehead; a, antenne of the first 
pair; a*, antenne of the second pair; ¢, clypeus; /, labrum; /*, lingua ; 
m, mandibles; 2, first pair of maxille; 2z*, second pair of maxille; 
px, maxillipeds; A, sphenoid plate ; s, prosternum; s*, mesosternum. 
Il.—Notule Lichenologice. No. XIX. 
By the Rev. W. A. Leicuton, B.A., F.L.S. 
As Dr. Tu. M. Fries’s ‘ Lichenes Spitzbergenses’ will in all 
probability be in the hands of few persons in this country, 
and as there is a possibility that some of his new species may 
occur in the northernmost portions of Great Britain, we here 
extract his descriptions of them. 
1. Lecanora coriacea, Th. M. Fr. 
Crusta crassa, contigua, torulosa |. verrucosa, luteo-albida (I. 
in roseum vergente), subnitida. K imbuta primum fulves- 
cente, dein sanguinea ; apotheciis non visis. 
* - 
