Through the generosity of Mr. W. Hill, the Museum of Practical Geology possesses a tooth found in the “Totternhoe Stone” in the -neighbourhood of Hitchin, which is of especial interest inasmuch as it is undoubtedly closely related to Iguanodon, and is of later date than any British Dinosaurian remains hitherto recorded; the Acanthopholis horridus of Prof. Huxley, from the Chalk Marl, and the Trachodon (Hadrosaurus) Cantabrigensis, of Mr. Lydekker, from the “Cambridge Greensand,” being, up to the present time, the most recent of known British Dinosaurs. Remains of allied forms, however, have been found at a higher horizon of the Chalk of Maestricht, and have been described by Prof. Seeley, and M. L. Dollo.'

The occurrence in the Ledbury “Passage-beds” of a united series of teeth referable to the American type of fossil fishes named by Prof. Newberry Onychodus, was made known by Mr. A. Smith Woodward in the GEOLOGICAL MAGAZINE for November, 1888; and in the British Museum Catalogue in 1891. Since then I have met with another example of the genus among the stores of the Geological Survey, which, as it seems to be quite distinct from the Herefordshire species, and is from a distant locality, deserves to be placed on record.

In the course of investigations amongst the Microzoa from the Gault of Copt Point, Folkestone, some Forarainifera came under my notice, which are hyaline representatives of the usually arenaceous type Webbina. These forms are remarkably similar in external appearance to those of the arenaceous group, but microscopical examination of the test under a high power reveals the finely tubulated structure characteristic of the hyaline type.

In some papers which you have done me the favour to print in the GEOLOGICAL MAGAZINE, I have endeavoured to apply a new touchstone to test the age of high mountain chains and of land of high elevation, namely, the presence or absence of distinct and prominent traces of former glaciation, and I have argued that where such traces are not forthcoming in a very unmistakable manner, we are justified in concluding that these highlands have been elevated since the so-called Glacial Period. I have endeavoured to apply the touchstone in question to the Ural and Altai Mountains, to the Thian Shan and Himalaya ranges in Asia, and to the great Cordillera which binds together the two continents forming the New World. I wish to make my survey more complete by an examination of an interesting area comprising Eastern Europe and South Western Asia.

In the course of my work in the Highlands of Forfar, I have been much struck with the mode of occurrence of certain light-coloured gneisses, of undoubted igneous origin.

They are intruded into the surrounding rocks in an infinite number of thin bands or sills, generally interlacing, and often not more than two feet thick; sometimes not exceeding an inch. Their bulk in some areas exceeds considerably that of the older rocks, at other times it is far less.

Two points are easily noted; first, they have no selvage edge; secondly, they have a very characteristic aspect, due to rounded grains of oligoclase.

During late years, by the opening of new sections, fresh information has been obtained of the geology of different parts of the country, and several fine excavations, the result of railway enterprise, have afforded great sections of the Kellaways beds in localities where only conceptions of them previously prevailed. Gaps have been filled up, and the continuity of the beds over extended areas confirmed. The principal revelations come from the Hull and Barnsley, and from the Swindon and Cirencester railways, opened respectively about 1881 and 1883, and the works now in progress in connexion with the widening of the main line at Oakley, near Bedford.

Prof. Blake, F.G.S., President of the Geologists' Association, has been good enough to send me cuttings from his recently published work “Annals of British Geology” containing his running comments on papers by me published during the period embraced by his volume, and for which I desire to tender him my best thanks.

I think it will be more courteous on my part to offer a few observations by way of reply to Prof. Blake's criticisms than to allow them to pass in silence; but I must confine myself to one paper, by way of sample.

Prof. Blake's book is a valuable work of reference; but the criticisms appear to be both hurried and inaccurate. In the notice of my Monograph the title is incorrectly given: there are certain other clerical errors; and some mistakes which a little more investigation would have prevented.

While placing his comments in brackets, it is unfortunate that Prof. Blake has not found some means to distinguish between remarks based upon the author's words, and statements of his own. This is especially noticeable in the “critical digest” of Haugia, where remarks, which appear as if they originated with Prof. Blake, are really my statements in another form.