138 Reports and Proceedings—Geological Society of-London. . 
above the fosse at the side opposite to the Kame Hills: ‘‘ here the ice- 
front rested as the apron-plain developed in front from the overwash, 
and this slope thus marks. the actual front of the ice at any point”? 
(p. 381); and (4) ‘‘the apron-plain,’”’ sloping gently away from the 
top of (3) and built up of sandy and gravelly material by streams 
issuing from the front of the glacier. These features are traced across 
N antucket, though not uninterruptedly ; and their general aspect is 
well shown in numerous photographic plates. Of these features the 
first and the last may be recognized in the lowland drifts of many. 
parts of our own Islands; but ‘‘the fosse” and ‘‘the ice-contact 
slope” appear to be unknown, or at any rate have hitherto escaped, 
recognition. In the interpretation of drift-features, however, so much 
depends upon the foreknowledge of the investigator, that if the 
attention of our glacialists be turned to the search it is possible that 
some representative configuration may yet be found in our drifts, 
though likely, in any case, to be of local and restricted occurrence. 
The presence of a fresh-water lake (‘Lake Shaler’’) held in 
between the lobes of the retreating ice-sheets, is postulated to explain 
the late-glacial phenomena of the Cape Cod region; and a full 
consideration of this matter occupies one of the later chapters of the 
book. Finally, the treatise, thesis, or book contains a lengthy 
bibliography, but no index. 
Geo: 
III.—On a Sxcron iy a Posr-Guacrat Lacusrrins Deposrr AT 
Hornsea. By T. Suepparp.' 
poms the past few years the various sections in post- ol 
lake-beds on the Holderness coast have disappeared, as a result 
of the erosion of the cliffs, and it has been exceedingly difficult to 
obtain details of the various beds in consequence. During the Spring 
of the past year, however, several on-shore gales resulted in a 
sea-wall in front of the promenade at Hornsea being demolished, 
behind which was exposed an exceptionally fine series of clays, marls, 
peat, and gravel, representing the bed of an ancient mere. - This was 
évidently at one time beneath a sheet of water similar to the present 
Hornsea Mere. Lists of remains of plants, fresh-water shells, 
Coleoptera, ete., are given, and the fauna and flora of the old and 
modern meres compared. pe 
REPORTS AND PROCHHDINGS- : 
GxrotogicaL Socirry or Lonpon. 
January 23rd, 1907.—Sir Archibald Geikie, D.C.L., Se.D., Sec. R. 8., , 
President, in the Chair. 
The following communication was read :— 
‘On the Geology of the Zambezi Basin around the Batoka Gorge 
(Rhodesia).” By George William Lamplugh, F.R.S., F.G.S8. With 
Petrographical Notes by. Herbert Henry Thomas, M. AS B.Sc. BGS: 
' This paper contains an account of the physiographical and geological 
structure of the hitherto undescribed country bordering the Batoka 
1 A paper read in Section C (Geology) at British Association Meeting, York, 1906, 
