On New Fossil Forms from the Old Red Sandstone. 195 



(fig. 2, b c), 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 unbarbed ; those of the septal 

 bands furnished with a zig-zag 

 thread. When the animal was 

 separated from the peduncle of the 

 Medusa, and placed in a dish of 

 sea-water, it slowly 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 



* ° . . J Fultom : — a, superior angle ; b, lateral 



body, and permitting ingress of angle ; c, inferior angle ; d d, septa ; e e, 

 water therein. During contrac- interse P ta - 



tion, this funnel was everted, and became a cone, through the apex of 

 which the fluid was again ejected. 



II. 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 

 Pterygotus,Eurypterus, and Kampecaris, with detached plates, 

 and Parka decipiens. The deposit (discovered some time ago 

 by the Rev. 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 



