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The orthopyroxenes of Gosse Pile, a layered ultramafic sequence within the Giles Complex of central Australia, show unusual exsolution features such as the development of 'hour-glass' shapes by clinopyroxene lamellae, and also the exsolution of spinel and rutile. Both orthopyroxene and clinopyroxene have high R2O3 contents and their distribution coefficients for Mg and Fe are high (average KD = 0.88). Some, if not all, of these features are considered to indicate that the Gosse Pile rocks crystallized under high pressure. This interpretation also explains the predominance of orthopyroxene over olivine as an early cumulus phase. Estimated conditions during crystallization are 10-14 kilobars and between 1,200-l,400°C.

An investigation of plagioclases from the Gosse Pile ultramafic layered intrusion has shown a negative correlation between strontium and anorthite content, irrespective of rock type or whether the plagioclases are cumulus or intercumulus. This general trend is regarded as reflecting the relative ease of entry of strontium into the plagioclase lattice with change in composition.Comparison of G values (Smith & Gay, 1958) of these plagioclases with those from other layered intrusions has shown that G values, measured using unheated plagioclases, cannot be used to construct a universal determinative curve. However, G values measured on heated samples can be used to determine indirectly compositions between about An45 and An86, irrespective of the source of the feldspar.The rocks from Gosse Pile show the development of antiperthite, an unusual and rare feature in layered basic intrusions, so far found only in parts of the Giles Complex. Although the cause of this is not known, especially as the K2O contents are comparable with those of "normal" plagioclases from other layered intrusions, it is suggested that high pressure may be a significant factor in promoting the exsolution of potassium feldspar.

Mapping has shown Gosse Pile, a near-vertical uitramafic part of the Giles Complex, to be a multiple intrusion. The first rocks form a layered sequence of cumulates, dominated by orthopyroxenite, in which cyclic units can be recognised. Following deformation, which has removed most of the more felsic units of the layered sequence, there have been intrusions of noritic rocks, including mafic pegmatites, picrites and several generations of dolerite.

The first specimens from the west coast of Scotland of the lysianassid amphipod Acidostoma neglectum Dahl are recorded, and the distribution of this species is mapped. The two specimens, from Loch Ewe, Wester Ross, and Kames Bay, Millport, were collected in association with the anthozoan Peachia hastata Gosse, thus adding further evidence to support recent suggestions that members of the genus Acidostoma are ectoparasites of anthozoans.

It is always a pleasant thing to meet Mr. Gosse in print, whether he ushers himself into the world from the Red Lion press in Pæternoster Row, or obtains the sanction of “the Committee of General Literature and Education appointed by the Society for Promoting Christian Knowledge.” Why Mr. Gosse publishes his books under the direction of a Society for promoting Christian knowledge at all we are at a loss to perceive, for we find nothing in this book that might not have been published by Mr. Van Voorst, or the most sceptical publisher in the Row. We are, in fact, a little jealous of religious societies publishing books of this sort, both on the grounds that such books are not strictly Christian, and that funds are appropriated to their production to the injury of the regular publisher which were not intended for this object. It is true that this does not in any’ way interfere with the quality of the work, and this is with what we have more particularly to do. As its name would imply, Mr. Gosse’s book is a popular introduction to working with the microscope. It differs, however, from other introductions to the microscope, that it contains no account of the structure of the microscope at all. This is really a feature, albeit a negative one, in the book. As reviewers bound to read every word of every book we notice, we are glad for once to deal with one on the microscope without anything about the microscope at all.

The influence of hydrolysis of MBBA by residual water on its transition temperature is investigated. The overall rate constant of this reaction is determined. The electrochemical properties of MBBA and of the products formed by its hydrolysis (p-butylaniline and p-n-anisaldehyde) are described and related to the electrical behavior of an MBBA sample during a long application of a dc voltage p-butylaniline, the most electroactive of the three compounds, is shown to be responsible for the rapid degradation of the displays filled with MBBA.

The designing of DNA intercalating drugs with high DNA affinity in the series of ellipticine has led to a new antitumoral agent, 9-hydroxyellipticine, which has a high DNA affinity, a high activity on L 1210 mice leukemia, and a lack of toxicity at therapeutic dose. The possible correlations among chemical structure, DNA reactivity, and pharmacological activity of DNA intercalating drugs are discussed.

During my stay at Tenby last summer, I had some opportunities of studying the new and singular animal Dysteria, the subject of Professor Huxley’s excellent memoir in the January number of the f Quarterly Journal? While I cannot but admire the skill with which he has worked out the interior structure, some parts of which presented to my own investigations insuperable difficulties; and while, in respect to most of the details which I did succeed in resolving, I agree with him; I had, before his memoir was published, formed a different judgment as to its zoological position.