Although the Permian species of Coelacanth, Coelacanthus granulatus, has been known since 1829, and although many authors have described specimens of it, it has remained unfortunately one of the lesser known of all Coelacanths. Since C. granulatus is the genotype of Coelacanthus, and since all the Carboniferous and some Triassic species have been assigned to this genus, it is surprising that further description has not been forthcoming. One of us (J. A. M. T.) has for some time been working on the Carboniferous Coelacanths, and it has been impossible to determine whether these really belong to the genus Coelacanthus. Accordingly it was hoped that by re-examining all the available material a more diagnostic description might be given. In doing this the authors have only been partly successful, as some of the most important generic characters—the dermal bones of the cheek and snout—were not preserved in any of the material examined. However, sufficient diagnostic characters have been provided by this research to distinguish the Carboniferous forms from this Permian genus.

The present paper deals with a number of intrusions lying within a north-easterly oriented belt of country, 4 miles wide and 12 miles long, running from a point 1½ miles west-south-west of the Brack, through the Arrochar mountains and across the head of Loch Lomond, to the upper reaches of Glen Gyle, 3 miles east of Ardlui (Text-fig. 1). Only one of these attains any considerable size. It lies north-west of the head of Loch Long and may be called the main Arrochar intrusion.

IN 1917 Professor E. S. Moore, of the School of Mines, Chicago, U.S.A., kindly sent me a photograph together with this note: “I am sending you a photograph of something which may illustrate your bubbles on the australites. Mr. Dudley of the Metallurgy Department was working with a small crucible containing slags and by accident a drop of water fell on the surface, with the result that a bubble was developed, such as you see in the photograph. The photograph is not a very good one; but it will show you what I mean.

A specimen collected by the Sedgwick Club in 1933 from the Comley Breccia Bed yields an excellent series of examples of this species and adds much to our knowledge of this Middle Cambrian form.

The question of the age of the Northern Schist Range of Trinidad, or the Caribbean group of Messrs. Wall and Sawkins, is an important one in Antillean geology. Wall and Sawkins 3 state that “Calcareous rocks are represented by two varieties in this series, viz., crystalline limestones contained in the slates and alternating with them; and compact limestones, either quite unconnected with the schistose group, or only associated with its upper strata”. Further “The compact limestones form a portion of the LaventiUe Hills, and several islands of the gulf. Some beds to the east, situated at the base of the range, such as those of Laurel Hill, and inter-stratified in the slates, are supposed to belong to this variety; but the sections in general are not such as to indicate the precise relations of the compact limestones to the micaceous series”.

SOME years ago, hard limestones containing corals were discovered cropping out in the railway cutting at Km. 65 near Tulkarem. These contain various coral types, but it was found impossible to determine their age. Since that time, reef limestones with abundant calcareous algae (Lithothamnium) and Hydrocorallines of the Millepora group have been found in various localities and are the first Miocene rocks to be recorded from Palestine.

The material to be described here comprises the sponges and, a coral collected by Dr. C. T. Trechmann at Toco, Trinidad, and mentioned by him in the foregoing paper. All the specimens have been kindly presented by him to the British Museum (Natural History).

In collaboration with Dr. R. G. S. Hudson, the author recently discussed the correlation of the Namurian and Dinantian strata of Western Europe (17) and reviewed the Variscan orogenic movements which attended their deposition (18). Only incidental reference, however, was made to the igneous activity of the periods under consideration and it is the purpose of the present communication to rectify this omission.

The trachytes of Mont Dore were described, in the early days of microscopic petrography, by A. von Lasaulx; and they have since been noticed, in conjunction with other trachytes of the Auvergne, in papers by Fouqué, Lévy and Lacroix, and Dickson and Holland.