Previously to this discovery, the trias was the oldest stratum in which any remains or signs of a Chelonian had been detected. Numerous other trails have since been observed (1850-51) in various localities in Canada, all in the same very ancient fossiliferous rock; and Mr. Logan, who has visited the spots, will shortly publish a description of the phenomena. _Chelonian foot-prints in Old Red Sandstone, Morayshire._--Captain Lambart Brickenden has just communicated to the Geological Society of London a drawing and description of a continuous series of no less than thirty-four foot-prints of a quadruped observed in the course of last year (1850), on a slab of sandstone quarried at Cummingstone, near Elgin, in Morayshire, a rock which has always been considered as an upper member of the Devonian or "Old Red."[ix-A] A part of the track, the course of which was from A to B, is represented in the annexed woodcut, fig. 521. The foot-prints are in pairs, forming two parallel rows, which are somewhat less distant from each other than those of the Lower Silurian tortoise of Canada above mentioned. The stride, on the other hand, is four inches, or twice that of the Beauharnais Chelonian. The hind foot is exactly of the same size, being one inch in diameter, and larger than the fore foot in the proportion of four to three. [Illustration: Fig. 521. Scale one-sixth the original size. Part of the trail of a (Chelonian?) quadruped from the Old Red Sandstone of Cummingstone, near Elgin, Morayshire.--Captain Brickenden.]