Previous investigations of the cameral deposits of nautiloids are reviewed, with a discussion of their morphology, their distribution in shells, and growth relationships with other shell parts. Cameral deposits are developed commonly in the orders Actinoceratida, Michelinoceratida, Discosorida, and Oncoceratida. While the patterns and growth relationships of cameral and siphonal deposits are specific, and therefore of great potential taxqnomic value, the presence of such structures alone is not a valid basis for the recognition of species or genera.

Petrographic and chemical study of New Zealand keratophyres, occurring in a typical spilite-keratophyre association, shows that they were originally partly glassy flow-rocks and breccias comparable with rhyolites of young volcanic areas. They are now composed of a low temperature mineral assemblage inconsistent with textural evidence of high temperature extrusive origin, and alkali metasomatism has enriched some rocks in soda and others in potash, so that their compositions are symmetrically disposed about that of a primary rhyolite magma with roughly equal amounts of the two alkalis.

Data from other occurrences suggest that this condition is common amongst described keratophyres.

Though the rocks do not originate from any special magma, the term keratophyre should be retained, with appropriate qualifiers, for old rhyolites with low-temperature mineralogy, which, incidentally, will often be found to have been affected by alkali metasomatism.

Field observations collected on a short expedition to Jan Mayen indicate that ankaramite was extruded at three different periods at the north-eastern end of the island, either as lava flows or pyroclastic deposits. Cycles of volcanic activity, in which the earlier lavas are ankaramite and the later ones trachybasaltic, have been recognized.

The chief metamorphic minerals are described and, in addition to those reported by Lamplugh, cordierite (at scattered localities along the structural axis) and staurolite (at Glion Darragh, Archal-lagan) are found to occur. The distribution of metamorphic minerals recorded by Lamplugh is confirmed. The age relation of the new minerals to the movements is deduced from microscopic evidence. This is: early folding and development of biotite; relaxation of stress and development of cordierite; shearing and recrystallization of biotite along planes of fracture-cleavage; high grade metamorphism at Archallagan which outlasted the fracture-cleavage movements.

It is concluded that the postulate of a buried granite beneath the axial belt most readily accounts for the distribution of the metamorphism.

A Basement Complex graphite-limestone on Changalumi Hill, along the eastern escarpment of the Southern Nyasaland rift-valley, exhibits various phenomena including contorted exotic boulders, migration of graphite, and injection of discordant veins into adjacent gneiss. These features indicate that the limestone has burst through its anticlinal roof during strong isoclinal folding at a relatively low temperature, engulfing and distorting a minor synclinal infold. The age of the break-through is proved to be pre-Chilwa Series and pre-Rifting.

This genus is not present in pre-Oligocene rocks and probably does not occur below the basal Miocene. Stratigraphical and micropalaeontological evidence is produced to support this statement.

Two species of Argyrotheca new to this country are recorded from the type Bracklesham Beds, and a full description given of the associated Terebratulina edwardsi, previously known from immature specimens only. The British Eocene brachiopods are listed, and the ecological significance of their rarity and distribution briefly discussed.

The usefulness of plants in directing the attention of the archaeologist to likely sites of human occupation is well known. Their value to the geomorphologist is indicated in the following example, which puts on record the existence of stone stripes in Breckland.