COUNCIL FOR 1847 . 
11 
considered unique, the cranium of the Ichthyosaurus exhibiting 
neither displacement nor compression, while the lower jaw of the 
Teleosaurus is detached, so as to allow of the superior surface 
being seen through its whole extent, to the termination of the 
condyloid processes.” A very beautiful specimen of Asterias 
arenicola (figured in pi. 17 of the London Geological Journal) 
has also been obtained by purchase. The most remarkable 
donations to the Geological collection have been the remains of 
Gyrosteus mirahilis Agassiz, (a gigantic osseous fish) from the 
Lias of Whitby, presented by Dr. Murray, of Scarborough,—a 
unique Ichthyolite, (Pleuracanthus Isevissimus Agassiz') pre¬ 
sented by the widow of a late lamented member of the Society, 
the Rev. T. Egerton,—a series of fossils from the Gloucester¬ 
shire Lias, by Mr. Allis,—and some interesting remains of fishes 
from the Caithness slate at Thurso, by Mr. David Graham. 
Mr. Charlesworth has made considerable progress in labelling 
the general collection of fossils, and mounting the specimens on 
tablets, a mode of arrangement which displays them to great 
advantage. The fossils of the green sand, chalk, London clay, 
and new’er tertiary beds, are now exhibited after this method, 
which he proposes gradually to extend to other parts of the col¬ 
lection. 
The first part of the list of British fossils, referred to in the 
report for 1845, embracing the whole of the known Tertiary 
species, is now ready, and copies are laid on the table for the 
inspection of members. 
The Council would also invite the attention of the Members 
to the specimens of fossil zoophytes from the Flamhorough 
Chalk, which Mr. Charlesworth has happily succeeded in clearing 
from the matrix by the application of dilute muriatic acid, so as 
strikingly to exhibit not only the external aspect of these organic 
remains in their original perfection and beauty, but also to shew^ 
their internal structure. 
No donations of particular moment have been received for 
the general collection of Ornithology; but a portion of the 
Malacca collection, formerly purchased by the Society, has been 
mounted at a considerable cost. The appropriation of one of the 
