The sub-genus Chasmops of the genus Phacops is so rarely, if ever, found in great Britain, except as disconnected heads and pygidia, that a specimen which shows the cephalic shield attached to several thoracio rings deserves notice.

The two British species recognised by Salter (omitting the doubtful Ch. Jukesii) are Ch. macroura (Sjogren) and Ch. conophthalmus (Boeck?), but he apparently perceived that more than two species were included under these names (Mon. Brit. Tril. p. 38).

The results of Mr. W. S. Valiant's long search for the appendages of Trilobites have recently been made known by Mr. W. B. Matthew, who described the material sold to the Columbia College of New York by Mr. Valiant. Mr. Valiant informs me that he discovered traces of what he considered to be antennæ, and that for several years he continued collecting until he found a locality where the specimens were well preserved and showed, not only the antennæ, but legs and what he supposed to be the swimming appendages.

Being present at the reading of the abstract of my friend Prof. Brögger's paper at the last meeting of the British Association, and having listened to certain laudations thereon, I, with several others, went away with the profound conviction that our Scandinavian colleague was about to bring down upon us a mass of evidence bearing on the differentiation of rocks as irresistible and overwhelming as that of his Viking ancestors in times gone by.

Many years ago, and before I entered on my duties in the Edinburgh Museum, the late Mr. C. W. Peach pointed out to me a specimen in the Hugh Miller Collection, which he was inclined to consider as new. It was a Cromarty nodule with dislocated remains, including a dorsal and a pectoral spine, of what was apparently a Diplacanthns of unusual size.

There are signs accumulating everywhere that the views so logically pressed to their conclusion by Hutton and Playfair, and by a great catena of geologists, since the appearance of the first edition of Lyell's “Principles of Geology,” have received a certain check; and no one can read the works of the great Continental geologists without seeing that there is a tendency to reconsider the position, and to hark back to the views of another school of teachers.

It is important, in the first place, to discuss those facts concerning the Earth which must be taken into account in any attempt to deal satisfactorily with the problem before us.

To a depth of about 80 feetinTemperate regions, the earth has its temperature determined by the seasons; being warmedinsummer and cooledinwinter.

I have to thank Dr. Callaway for the courtesy and good-humour with which he has received my criticisms on his paper in the December Number of the GEOLOGICAL MAGAZINE. Would that all controversial fencing were conducted with equally well-tipped foils.

My Roman soldiers,inparticular, have been received with a kindness that reminds me of the friendly meetings of the British and French officers in the Peninsular War during brief seasons of armistice. Indeed, one might almost go so far as to say that friendly intercourse with these Koman cohorts has imbued Dr. Callaway with a taste for military tactics, and has inspired him to perform a masterly change of front under cover of the active advance of a line of skirmishers.