A zone of intense metamorphism extends for six feet on both sides of a nearly vertical fifteen feet wide olivine dolerite dyke. Adamellites have been converted in situ to rocks resembling quartz porphyries, and mobilization of cordierite gneiss has been effected. Petrography and chemical analyses show that metamorphism is not purely thermal. Although little actual fixation of doleritic “end liquors” took place in the wall rocks the cause of these remarkable contact effects is ascribed to hydrothermal activity near the “blind end” of the dyke.

The writer describes the relief forms and destructional processes occurring in a group of granite hills in Damaraland, South-West Africa. The hills are attributed to the dissection of a former erosion surface by rejuvenated streams. Drainage incision has followed longitudinal and diagonal joint lines, which control the orientation and sub-division of individual groups of granite domes. The destruction of granite masses by plating, or the unloading of Unweathered shells, produces the dome outline, whereas the development of vertical jointing leads to granite tors. Domes may be cleaved along transverse joints to form secondary domelets, or split longitudinally to form narrow whalebacks. The former are lowered by plating to flat dome forms the latter are reduced by marginal fracturing, here termed mural weathering. Further wastage is by slow granular disintegration on low granite outcrops.

Practically monomineralic masses of talc, of magnesite, and of chlorite are formed in talc-magnesite-chlorite-rocks as a result of localized shearing and associated hydrothermal activity within deformation-belts.

On Orval, in the Isle of Rhum, Tertiary plateau lavas directly overlie the granophyre of the ring-complex. Judd considered that the Orval basalts rest unconformably upon an old land surface cut in the granophyre; but on the supposed existence of veining and metamorphism later workers, in particular Geikie and Harker, concluded that the granophyre had intruded the volcanic pile. The author's re-examination of the Orval rocks supports Judd's early interpretation.

A possible cause of the lineation developed in the Scottish Highlands and elsewhere may consist in the presence of sub-crustal convection currents. While it is recognized that these are, to some extent, conjectural, the probable results of the conjecture are compared with the directions of lineation, in areas where this structure has been investigated.

The following note provides the first detailed description of an inlier of metamorphic rocks occurring in the core of an anticline of Carboniferous Limestone at Rosses Point, three miles north-west of Sligo.

The metamorphic rocks are shown to belong to the kyanite zone; comparison with the Lough Derg area suggests a Moinian Age.

Southern Israel is traversed by a series of north-easterly trending anticlines, the largest of which is the Raman anticline. Here a deep erosion-cirque exposes a sedimentary succession from the Cenomanian down to the Triassic, including a series of magmatic rocks of highly alkaline affinities. The forms of these magmatic bodies are described in detail and from their field-relationships with the sediments it is shown that they include a stock, a laccolith, sills, dykes, and a basaltic flow. This igneous activity took place between Lower Triassic and Upper Jurassic times and was perhaps restricted only to the Jurassic. Comparison with the surrounding areas leads to the conclusion that the Raman region was the centre of magmatic activity during this period.

Kinematic analysis of tension gashes in an exposure of the Moine Series indicates that the fractures resulted from a tectonic movement directed from north to south, unrelated to that responsible for the nearby Caledonian Moine Thrust.

The name hanléite is proposed for a magnesia-chrome garnet from Hanlé, Rupshu, Kashmir.

The view is put forward that, as any subdivisions of an evolving plexus must be arbitrary, the existing binomial system of nomenclature should continue to be applied to morphological species in palaeontology, rather than be replaced by any other arbitrary system which could not be applied generally.