It is now more than thirty years ago since, with my friend Professor T. Eupert Jones, F.R.S., we commenced to Edit the Geological Magazine, Messrs. Longmans & Co. being our publishers.

To my regret Prof. Rupert Jones retired from the Editorship in June, 1865. After that date, aided by Prof. John Morris (since deceased), and by my colleagues, Mr. R. Etheridge, Mr. Wilfrid Hudleston, and Dr. G. J. Hinde, the Magazine has enjoyed an uninterrupted existence and a well-earned position as a scientific journal.

The curious little shield-like Crustaceans, known under the generic name of Cyclus, were first noticed by de Koninckin1841, and have been subsequently figured and described by various authors, but their exact systematic position lias never been clearly understood owing to the absence of appendages or other indications by which their affinities might be satisfactorily ascertained.

In 1868 I gave a description, with figures, of two species:' one of which, the Cyclus radialis, had been previously noticed by de Koninck and Phillips; the other, C. Bankini, was then first made known.

In 1870, under the title of “Contributions to British Fossil Crustacea,” I redescribed the above-named species, and added Cyclus bilobatns, C. torosus, C. Jonesianus, C. Wriyhtii, C. Harknetsi, C. (Halicyne) laxus, C. (Halicyne) agnotus.

The next record of the genus is to be found in the fifth part of my Monograph of British Fossil Crustacea of the order Merostomata, which records and figures the then known seven British species of Cyclus, but adds no new forms.

In 1883 Mr. B. N. Peach, F.K.S., L. and E., F.G.S., published an account of Cyclus testudo, from the Carboniferous series of Langholm, to which reference will again be made later on.

In 1893 I noticed a new British species of Cyclus, discovered by Mr. George Scott in the "Gannister seam" of the Lower Coal-measures, Old Clough Colliery, Bacup, Lancashire, which I named Cyclus Scotti.

In the same year Mr. F. E. Cowper Eeed, B.A., F.G.S., of Trinity College, Cambridge, gave a description of what he deemed to be probably a new species of Cyclus, from the Carboniferous Limestone of Settle, Yorkshire, near to, but not identical with, C. Harhiessi, which he named V. Woodwardi.

To the west of the London and North-Western Eailway, after it has surmounted the incline of Shap Fells, lies the valley of the Eiver Lowther, which eventually flows into the Eamont, whichinturn drains into the Eden. The Lowther, flowing in a general northerly direction, receives the drainage of three important streams, coming from the south-west. The first of these flows through the valley of Wet Sleddale, just north of the Fells, which exhibit the exposures of the Shap Granite. It is lettered W.S.inFig. 1. The second, Swindale (S. Fig. 1), the subject of this paper, joins the Lowther stream at Kossgill Hamlet, about two miles north of Shap Village, whilst the third, Haweswater Beck (H.B. Fig. 1), flows out of Haweswater (H. Fig. 1) and joins the Lowther at Bampton.

Proceeding up Swindale from Eossgill, we follow the road over Eossgill Moor, a barren tract of country occupied by Skiddaw Slates, to Swindale Foot, near which the Borrowdale Volcanic Group appears, and causes the fine cliff scenery which marks the upper part of Swindale.

As Western Australia is attracting considerable notice on account of the recent rich gold discoveries, a short paper upon its geological formations may be of interest.

Regarded as a whole, Western Australia is not an interesting field for geological research, at any rate from a stratigraphical or palasontological point of view, for, with the exception of one or two districts in the north, all the rock-outcrops are either granites, crystalline schists, or volcanic dykes.

The district of Carrock Fell,inCumberland, is one richinvarieties of intrusive igneous rocks. Those on Carrock Fell itself, while probably belonging to one period of igneous activity, fall under three or four heads, which can be arrangedinchronological sequence, as follows:—

(i.) a large intrusion of gabbro generally laccolitio in character.

(ii.) a granophyre, also forming laccolitic bodies, but with associated dykes and veins which traverse the gabbro.

(iii.) a diabase or gabbro, not essentially different from the first intrusion, but injected later and under somewhat changed conditions.

(iv.) a large number of dykes and veins of intermediate to basic composition.

These last are found traversing all the other rocks, and therefore, if we are justifiedingrouping them all together, they represent the latest intrusions in the neighbourhood. They vary from straight dykes two or three feet wide to narrow and rather tortuous veins not more than an inch in width.

I have recently presented to the Geological Society an account of the larger intrusive masses of Carrock Fell,1 and I originally intended to include also the minor dykes and veins alluded to. This purpose I abandoned in view of the multiplicity and variety of rocks which they include, but some of the specimens examined seem worthy of a brief notice.

My endeavours to establish a genetic relationship between the Annelida and the Phyllopod Crustacean Apus led me, very naturally, to the study of the Trilobites. Specimens were kindly lent me by Dr. Woodward, F.R.S., Prof. Judd, F.R.S., and by Prof. G. B. Howes, it being my privilege at the time to be working in the Huxley Research Laboratory, which is under his direction.

Picking at the fossil with a steel point taught me, what every worker soon finds out for himself, that the limbs which, under such a dorsal shield, would probably have been thin-walled structures, could not be differentiated from the matrix by any such method. Was there, then, no mechanical method of revealing the undersurface? At first I thought, among other things, of a stream of water, mixed with emery powder, forced through a rose; this idea led, very naturally, to the sand-blast. a visit to the London Sandblast “Works” (58A, Gray's Inn Road) gave some promise. The proprietor was kind enough to express interest in the idea, and showed me blocks of granite which had been treated with the sand-blast, and in which the harder elements stood outingood relief. a very short application of one of the sand-blasts belonging to the Works to the under-surface of a Trilobite from the soft Wenloek cleared away a large portion of the matrix, and revealed a small area of the under-surface of the carapace completely cleaned.inthis specimen there was no trace of any under membrane having been cut through, and the carapace was probably the last remnant of a cast skin.