Valves subcircular, approaching subquadrate, like some small Lamellibranchs. Umbo at the antero-dorsal corner, and at aa angle of 40° to the extreme curvature of the concentric ridgelets. Hinge-line straight, behind the umbo, about half the length of the longest diameter of the valve. The other edges rounded; the anterior nearly semicircular; the ventral obliquely curving up to meet the steeper and narrower posterior curve.

Since the original description of Ceraterpeton by Huxley thirty years ago, several specimens have been referred to this interesting Stegocephalan genus, one even to the typical species, C. Galvani. No new examples from the typical locality, however, have hitherto been described, and our knowledge of the Irish form has thus remained without extension. Now, a nearly complete new skeleton has been discovered at Castlecomer, by J. G. Robertson, Esq., of Dublin, and I am indebted to him and to Professor Grenville Cole for the opportunity of studying it, and adding somewhat to the known characters of the animal.

The green slopes of many of the minor vales of North Oxford-shire are scored with parallel terraces or terraced banks frequently of such regularity in depth of step and slope as to present to the mind any other origin for their formation than that of the every-day work of natural forces. A student who has mastered the elements of this natural work and has gained a clue to the mode of the making of the terraces reads with some amusement the varied accounts of their human origin. The best summary of these accounts is given in Mr. G. L. Gomme's book “The Village Community.” And though these accounts refer to wider tracts of country than can be discussed here, our local antiquarians assign similar human causes, and we read of the terraced slopes as camps, entrenchments, vineyards, bear-gardens, and the like.

The interest of this section lies in its bearing on the theoretical considerations relative to the causes that produced the extensive deposits of Bubble Drift in the South of England.

I am indebted to Mr. C. S. Middlemiss, Superintendent of the Geological Survey of India, for a copy of his Memoir on the Geology of Hazara and the Black Mountain recently published. Mr. Middlemiss has embodied in his Memoir the results of an unfinished survey by Mr. A. B. Wynne, late of the Geological Survey of India, and by linking these with his own more recent work, has given us an interesting and valuable Memoir on the Geology of the Himalayan district of Hazara.