On New Fossil Forms from the Old Red Sandstone. 195 
(fig. 2, he), while the last-named angle itself was produced outwards and 
downwards, so as to form a beaked process, as shown in the figure. The 
thread-cells of the tentacles are simple and unbarhed ; those of the septal 
bands furnished with a zig-zag -p. g 
thread. When the animal was 
separated from the peduncle of the 
Medusa, and placed in a dish of 
sea-water, it slowlj moved from 
place to place by the aid of the 
tenacious palpocils which studded 
the tentacles and upper part of the 
body, and alternately filled itself 
like a balloon, and emptied itself 
by a vermicular contraction of the 
parietes, which commenced be- 
neath the tentacles, and passed 
backwards. When dilated, it was 
seen that the animal was destitute 
of a sucking disc, and that the pos- 
terior part of the body terminated 
in a funnel-shaped depression, 
opening into the cavity of the 
body, and permitting ingress of 
water therein. During contrac- 
tion, this funnel was everted, and became a cone, through the apex of 
which the fluid was again ejected. 
Diagram of lateral view of stomach of H. 
Fultoni : — a, superior angle ; 6, lateral 
angle ; c, inferior angle ; d septa ; e e, 
intersepta. 
11. On New Fossil Forms from the Old Red Sandstone of Forfarshire, 
By David Page, Esq. (Specimens of the Fossils were exhibited. 
Mr Page next drew attention to some new fossil forms from 
the Old Red Sandstone of Forfarshire. These fossils occur in 
a bed of highly fissile shale, lying in the course of the Pow- 
burn, near the church of Farnell, and belong to the gray tile- 
stones, or lowermost series of the system. They consist chiefly 
of fishes and Crustacea — the former embracing three or four spe- 
cies of Diplacanthus, two of Acanthodes, Climatius, Cheira- 
canthus, and several forms yet undescribed, the latter being 
PterygotuSfEurypterus, and /lampecan^, with detached plates, 
and Parka decipiens. The deposit (discovered some time ago 
by the Eev. Mr Mitchell of Ferryden) was now being worked 
out under the superintendence of the Rev. Mr Brewster of 
Farnell, and Mr Powrie of Reswallie, solely for the fossils — 
the noble proprietor, the Earl of Southesk, affording every 
