The above form I found a year or two ago in the Encrinital Limestone forming the upper bed of the Lower Limestone Shales which occur on the south side of Combe Down (overlooking Combe House), near its western extremity. I have also traced it in an outcrop of the same limestone in the plantation on the north side of Kings-weston Down, near its western extremity. At both these localities the fossil is associated with Zaphrentis Phillipsi, a small coral which is characteristic of the bed. Palæacis probably also occurs in the corresponding beds exposed in the Avon section, and elsewhere; but though tolerably abundant, is not likely to be observed, on account of its small size, except where the rock is well weathered. The accompanying are sketches of two specimens from Combe Down which much resemble those figured in the Geol. Report of Illinois (Meek and Worthen), vol. ii. p. 262, plate 19, fig. 1 a, b, c.

Most of these islands appear to be of volcanic origin, their centres rising to high-peaked, cone-shaped, mountains, of from 500 to 6000 feet in height. The weather, east and south-east, sides are clothed with thick forests from base to summit; but the north-west and west sides in many of them have but a thin sprinkling of trees, the slopes being covered with a thick, wiry grass.

Some years ago (November 15th, 1869) Dr. Henry Landor, Superintendent of the London Asylum, Ontario, communicated to the Entomological Society of Canada some observations on the action of Ground-ice, which seem to be of sufficient importance to be reproduced in the pages of this Magazine. The Entomological Society does not appear to publish its transactions, otherwise a simple reference might have sufficed. The account of Dr. Landor's observations here given is extracted from the local Free Press, of London, Ont.