WE owe to Mr. Lamplugh a description of the lowest beds of the Gault and their junction with the Lower Greensand, as seen in sand-pits on the south side of Leighton Buzzard. Mr. Lamplugh proved the presence of the fauna of the mammillatus zone and found that the fossils preserved in the gritty phosphatic nodules of the lowest bed above the false-bedded sands include Douvilleiceras mammillatum (Schloth.) and the characteristic Desmoceras usually associated with it.

Dr. F. R. Cowper Reed, in a paper entitled “Notes on the Affinities of the Genera of the Cheiruridæ”, points out that Sphærocoryphe belongs to the Cheiruridæ, while Staurocephalus, which has at first sight some superficial likeness to it, belongs probably to the Enerinuridæ.

We may summarize our chief conclusions as follows:—

(1) The brachiopod-bed of Shenley Hill, as described by Messrs. Lamplugh & Walker, who referred it to the Lower Greensand, is shown by stratigraphical and palæontological evidence to be of a composite character. Its constituent parts belong respectively to the basement-bed of the Upper Gault and to the basement-bed of the Cenomanian stage, as understood by English geologists (sub-zone of Catopygus columbarius).

(2) The Cenomanian bed is present in the form of isolated lenticles of limestone. Although no comparable stratum can be found at the present outcrop, which has receded from the area where conditions produced this particular type of deposit, the bed has a close lithological counterpart in Northern France (Matringhem), where there is an almost identical bed at the base of the varians zone.

(3) At Harris's Pit the Cenomanian bed, an inconstant layer of Upper Greensand formerly seen above it, and an overlying mass of Gault Clay of rostratus age are in an inverted order of succession. There is a junction of erosion and non-sequence between the Gault and the Cenomanian bed.

IN my paper on the Lizard this rock is mentioned, but without a specific name, for I had not then seen the figure given in 1898 by Rosenbusch (Elemente der Gesteinslehre, 1898, p.51). He calls it Beerbachite, and describes it on p. 219 as one of his Ganggesteine, among those von malchitischem Habitus, quoting an analysis. The name appears to have been given by Chelius to a rock from Frankenstein in the northern Odenwald, where it forms small veins in a gabbro, and has the following analysis: SiO2 = 47·21, Al2O3 = 20·52, Fe2O3 = 7·48, FeO = 5·32, MgO = 4·16, CaO = 8·63, Na2O = 5·17, K2O = 0·33, H2 = 0·34, P2O5 = 0·46, with 0·19 FeS2 and 0·10 hygroscopic water. He states that the rock is fine-grained to compact, not lustrous, grey to pale grey in colour, consisting of a panidiomorphic mixture of labradorite and diallage, with a variable amount of hypersthene and magnetite, and that olivine-bearing varieties occur. In these commonly a brown hornblende replaces the diallage, in which the above-named constituents are pæcilitic. He states that beerbachite also occurs in gabbro near Harzburg and in the Isle of Mull.

THE country described in the following notes comprises the area lying between latitudes 10° N. and 11° 30′ N. and longitudes 8° 45′ E. and 10° E., and is situated in the northern portion of Bauchi province and the south-eastern portion of Kano province, Northern Nigeria.