In the foregoing description I have confined my remarks to the rightside of the skull. The observer will not fail to notice from the figures the disparities existing in the two sides. This asymmetryis particularly conspicuous ventrally, the region from which Huxley principally deduced the arguments in support of his more important speculations. The area of dislocation, the centre of which apparently lies in the crater-like opening of the left prtesplenial, extends from the left prasruaxillary to the pterygoid in the skull, and as far as the splenial on the lower jaw. Its place of greatest intensity has beenmarked by a + on the figure, where not only the surface of the bones is most damaged, but where the mandible has been so much compressed that a crest has actually been formed below the row of teeth on its outer wall.

On visiting Brough a short time ago I noticed a small section had been made on the western slope of Mill Hill, about twenty or thirty feet below the top. The excavation is made in soft white sand, which is very ferruginous in places. Beds of hard sandstone, varying in thickness from one to three inches, traverse it in the upper part of the section. These beds of sandstone are practically horizontal, and contain casts of Belemnites Owenii, Gryphæa bilobata, Trigonia, and other characteristic Kellaways Rock fossils. In not a single instance was a portion of a shell remaining, the whole of the calcite having been dissolved away. There is only a thin covering of soil; and this contains numerous pebbles of doubtful origin, and some pieces of Roman pottery.

The fossils to which this communication relates were described and the deductions drawn from their mode of occurrence in a paper I submitted to the Geological Society of London in 1896, but as that paper was not printed in extenso (see Q.J.G.S., vol. liii, p. 245), with the Editor's kind permission the gist of it appears as follows.

In the Geological Magazine for March, 1891, p. 119, I drew attention to the occurrence of a large Greywether in Moscow Street, Bayswater. Another and smaller example has lately been discovered in the foundations for the new buildings of the Victoria and Albert Museum, South Kensington. The excavations show:

Made ground and soil, about 5 feet.

Gravel, full thickness about 20 feet.

London Clay with cement stones.

Distribution.—Red Sea, East Africa, Ceylon, Java, etc. (Tryon); Red Sea, Persian Gulf, East Africa, Polynesia, Fiji Islands, etc. (E. A. Smith). Coll. Geol. Surv. Egypt: raised beach 80 feet above sea, Camp 6, north of Wadi Gueh, west of Kosseir (Nos. 1,651, 1652, Box No. 79j).

The name Nautilus clitellarius was given by J. de C. Sowerby to a Nautiloid from the Coal-measures, Coalbrookdale, Shropshire, and the description was accompanied by three figures, each representing a different specimen. In 1884 the species was included by Professor Hyatt in his new genus Ephippioceras. In 1891 Dr. A. H. Foord found a new species, Ephippioceras costatum, which was said to be “distinguished from E. clitellarium (to which it is, however, very closely related) by the character of the septa and by the surface ornaments. The septa in E. costatum do not form such an acute lobe upon the periphery as do those of E. clitellarium, and they are also a little wider apart in the former species than they are in the latter. Moreover, E. costatum is provided with prominent transverse costæ, which are strongest upon the sides of the shell where they swell out into heavy folds. These costæ are directed obliquely backwards, and cross the septa at an acute angle, passing across the periphery and forming a shallow sinus in the middle. None of the specimens in the British Museum have the test preserved, so that the ribbing has only been observed upon casts. The costæ are equally well developed upon the body-chamber and upon the septate part of the shell in the adult, but they were either very feeble or altogether absent in the young.” A re-examination of the specimens in the Museum collection shows that the separation of the two forms is quite justifiable.

The presence of Zieten's type-specimen of Ammonites calcar in the British Museum (Natural History) among some fossils which were bought of Dr. Bruckmann naturally suggested an examination of the other fossil Cephalopoda obtained from the same source, in the hope of finding other type-specimens. Thus far, the result of this examination has been the discovery of two more of Zieten's types; these are the type-specimens of (i) Ammonites polygonius and (ii) Ammonites discoides.