PEOCEEDINGS OF GEOLOGICAL SOCIETIES. 
149 
In the Microscopical Section, (16th February,) Mr. R. D. Darbishire 
presented specimens of mud and fossil shells (received through Dr. P. P. 
Carpenter) from the Post-pliocene or latest Tertiary deposits at Logan's 
Farm, Mile-end Quarries, near Montreal, Canada, described by Sir C. 
Lyell (' First Travels in ISTorth America,' vol, ii. p. J 35), and in Papers 
by Dr. J. W. Dawson in the ' Canadian Naturalist,' 1858 and in 1859. 
Mr. Darbishire, in a note to the Secretary, stated that one of the pecu- 
liarities of the deposit is that it seems to have been formed in a quiet 
hollow. Spiculse of sponges are found in position, as if the sponge had 
grown and been quietly buried on the spot. Amongst other character- 
istic fossils are numerous Foraminifera, and a siliceous and close-tex- 
tured sponge, referred to Tethea, of the species Logani, which is now 
found in water from the tide-line to 200 fathoms deep. 
CoTSWOLD Club. — From a reprinted paper on GrypJicBa incurva, 
with plates by Mr. John Jones, of Gloucester, which we have received, it 
appears that old and valuable club, the Cotswold, are devoting their re- 
sources to really good work. In Vol. III. of this periodical we printed a 
paper on Rhynchonella acuta by Mr. Jones, and the steps wliich tliat 
author then took to work out the identity of many so-called but unreal 
species he has repeated in respect to tliat more common and character- 
istic bivalve mollusk of the Lias, abundant and familiar, though it would 
seem in all its varieties yet not always a well-known shell, — the Gvy- 
phcBa incurva of Jiritish and Gryphcra arquata of foreign writers. The 
following extracts from Mr. Jones's paper will convey the views he promul- 
gates in respect to the various forms of Gryphaja which have received spe- 
cific names. 
"Gryphem. — 'A free, (except when very young,) unequal-valved, ineoui- 
lateral bivalve, larger valve involutely curved, concave, smaller valve nat- 
tish, beakless ; hinge, a transversely striated pit, containing an internal 
ligament, without teeth or crenatures.' 
" The Liassic species, recognized by most English writers, to which the 
foregoing generic terms apply, are those to which we have now to address 
ourselves, and maybe stated as follows: — Gryphcca incurva, Sowerby; 
G. suilla, Schlotheim ; G. obliquata, Sowerby ; G. Maccullochii, Sower- 
by ; G. depressa, Phillips; G. cymhium, Lamarck; all of which, labelled 
as above, are to be found in most collections of importance throughout 
the kingdom, and are more or less common (as we believe) in this district. 
" Upon inquiring where, as tyros, we may find pictorial illustrations of 
the difierences between them, we learn that we must refer to the works 
cited as follows : — For G. cymhium, to the ' Encyclopedic Methodique ;* 
the ' Petrefacta Germania) ' of Goldfuss ; the ' Coquilles Fossiles des 
Environs de Paris ' of Deshayes ; Sowerby 's ' Mineral Conchology ;' or 
Phillips's ' Geology of Yorkshire.' For G. depressa, to the last-named 
work. For G. incurva, to two of the former works; to the ' Petrcfacten ' 
of Zieten ; and Parkinson's ' Organic Ivcmains.' For G. suilla, to Gold- 
fuss, ' Petrefacta Germania).' For G. obliquata and G. Maccullochii, to 
Sowerby 's ' Mineral Conchology.' 
_ " It is scarcely necessary to observe, that all these works are of so expen- 
sive a character, as to place them beyond the reach of the great majority 
of geological students ; that they are all out of print, and not always at- 
tainable by those who can afford to purchase them ; hence, therefore, the 
desirability of carrying out the design we have formed. It will be seen in 
the sequel, that we shall have occasion to refer to various other supposed 
species, described by Continental authorities. 
" The first which claims our notice in stratigraphically ascending order is 
