The members of Mr. E. A. FitzGrerald's expedition to the Chilian. Andesin1896–7 made a rather large collection of rock specimens from the higher regions, which has been entrusted to me for examination. The descriptions will be published in Mr. FitzGerald's forthcoming book, but as two are exceptionally interesting I wish them to appear in the Geological Magazine.

If the paper on the recent geology of Sweden which has already appeared in the GEOLOGICAL MAGAZINE is sound in argument (and I have not met anyone yet who has answered it), it follows that the views ordinarily current in regard to the glacial geology of Northern Europe will have to be greatly modified. Scandinavia is confessedly the great focus and centre of the phenomena which have been interpreted as glacial.

The question as to the origin of mammals is not new, but one of a series of similar nature and difficulty. The origin of Birds, of Eeptiles, of Amphibians, and of Fishes really precede it, and offer less difficulties in solution. The answer to each,inmy opinion, belongs to the future, and how far it may profitably be sought in the present limited state of our knowledge is a fair question in itself.

Mr. Jukes-Browne's contribution to this subject, in the September number of the GEOLOGICAL MAGAZINE, brought out a clear reply from Professor Hull in the next issue. Here the argument practically ceased, for in his letter in November Mr. Jukes-Browne turned his correspondence into an academic disputation of the meaning of the word ‘escarpment,’ for which other expressions could have been used, and the flat denial of the evidence submitted by Professor Hull.