In his “Tableau générale des Poissons Fossiles,” published in 1844, and appended to the first volume of his great work, Agassiz enumerates five species of his Carboniferous selachian genus Cochliodus, of which he only described one, the well-known C. contortus; the others, of which the names only were then published, being C. magnus, C. acutus, C. oblongus, and C. strtatus.

In a paper lately published in the “Neues Jahrbuch” (Band i. 1884), Herr W. Dames, of Berlin, has made some observations “On the Phyllopod-nature of Spathiocaris, Aptychopsis, and similar bodies,” met with in strata of Silurian, Devonian and Carboniferous ages in Europe and North America, and described by Barrande, Salter, M'Coy, Meek, Hall, Clarke, Jones, myself, and others.

My friend Prof. T. Rupert Jones, F.R.S., has lately received several Palæozoic fossils for examination from the rich collection of Mrs. Robert Gray, of Edinburgh, and has, with the owner's kind permission, placed two pieces of a very remarkabte fossil in my hands, for the purpose of examination and description.

Mr. Jukes-Browne's proposed classification of our rock groups, in the July Number of the Geological Magazine, is a commendable attempt to solve an important question, especially where he proposes to establish divisions on palæontological evidence, in preference to depending upon minor breaks in the succession, which must always be more or less local

In an early number of the present serial Prof. Sir R. Owen described and figured the hinder part of the palate of a small mammal from the London Clay of Herne Bay, under the new name of Miolophus planiceps. The specimen is now preserved in the Museum at York, and had been previously described by Mr. E. Charlesworth under the name of Platychœrops Richardsoni; a circumstance which seems to have escaped the notice of Sir R. Owen. This name having the priority should supersede that of Miolophus. The specimen (of which there is a cast in the British Museum) shows the second and third true molars of both sides, and on the right side the fourth premolar and the alveoli of pm 3 and m. 1. Both the later premolars and true molars are of the same general form, and have tritubercular crowns. Sir R. Owen regarded the specimen as indicating a form allied to Hyracotherium (including Pliolophus); but the similarity between the premolars and true molars and the trituberculate crowns of the latter forbids the acceptance of this view

Having had placed in my hands by Prof. T. Rupert Jones (who has already communicated some notes on Sarsen Stones to your pages, Vols. for 1875 and 1876) some microscopic preparation of plant-remains found in Sarsen Stones from Wiltshire, belonging to Mr. Thos. Codrington, F.G.S., I would be glad to state in a sentence or two the results of my examination.