PROC: CEOL : ASSOC : PART Ill. VOL. XIX. PLATE I.

SECTION FROM THE THAMES TO TERRY'S L.ODGE NEAR IGHTHAM.

--EXPLANATION.-

r.Tertiary Strata

2. Chalk

SwanscombeHill

320 Ft,,,

b.

South Ash Terry's Lodge

700 Ft.A.

3.Upper Greensand and Gault

4-Lower Greensand

A.Eoliths

B.Transitionals

C.Hill Group Implements

E.Mousterian Types

O.Acheulian Types2,

1503 Ft .1000 ft .!

500 F l.!

Horizontal Scale °kl=======::i:::=======t=======~?Mileli

Vertical Scale ~

F.W.READER DEL.. WATFORD

J§Vds .

400\

300,200I

oHo.izontal Scale I

Vert ical Scale?10i12,5~.;a::0::::l::i':i:00======t"""'=::::a =====i;;;;=;;;;.=~ r r,

~ e'" "g '>'0 ,§~ !<ll

:

4~Terrace Crayford Milton Street Dartford Heath Swanscombe Hill20 Ft. below 0 .0. Brick Earth 0.0. Swanscombe 100Ft. 136ft. 320 Ft.

.-----.------------l--.----.-----------·~-------·------------------------------t ·-------------------------------t------------------------------------------------: i : i; i ~ !

1: :..... 0: o.~. • o.- -r.- 11--C::: 'i ! " -' ._.~ ~r::.\r.:::r::\e:::s-0-r---<=:~..<,..A" 0'J E. ~ I~ .;:-c::...c'l\~,~-_, .~ ......-~.~ ./<~, ~ -:--. I \ ---r-=', .,.--"\ ---,..........----. - .).....-y, ~.r:::SA/\I r-~~-c-'-l~~---1'_.::..l-.·r-- 'II ~::::...J--::-..-( ......--- ,_/ ~,/

Buried

C'T'I,,,··,,,,,,·,

To face IJage 100.I lIu slm ll"ug ,Vess rs . M . A . C. H illI on O· A . S . Ken nords' pap er, pp. 76 w (J.

101

VISIT TO THE BRITISH MUSEUM (NATURALHISTORY).

MARCH 11TH, 1905.

Directors: THE PRESIDENT AND DR. C. W. ANDREWS, F.G.S.

(Report by THE PRESIDENT.)

A PARTY of about sixty members were received by the Directorsin the Central Hall, and proceeded to the Gallery of FossilMammalia, where Dr. Andrews explained the newly-arrangedcases of primitive elephants. He pointed out how the diminutiveMoeritherium of the Middle Eo cene of Egypt passed into thelarger Paieomastodon of the Upper Eocene of the same country.The latter animal showed for the first time the reduction of thefront teeth to a pair of tusks in each jaw, the upper tusks curvingfreely outwards and downwards, the lower tusks at the end of along chin working against a pad on the palate. The long chinwas formed by the elongation of the bony symphysis of themandible, and the soft face and snout above it were notstrengthened by bone. Palaomastodon was followed by the stilllarger Telrabelodon, which lived in the Miocene period both inthe Old World and in North America. In the Pliocene periodthe true Mastodon arose by the sudden loss of the long, bonychin and the consequent fall of the soft face into a hangingproboscis or trunk. Finally, came the true elephant by stagesoften described in text-books.

Dr. Andrews also called attention to the skulls and otherremains of the remarkable Arsinaitherium found with Pakeamas­todon in the Upper Eocene of Egypt. This animal seems torepresent a sub-order of horned hoofed animals closely related tothe ancestral elephants.

Among other newly exhibited fossil mammals, the Presidentnext referred to a large collection of remains of the extinctground-sloth, Grypotheriu11l, from the well-known cavern nearLast Hope Inlet, in Patagonia. The freshness of the skin andbones was noteworthy, but the President thought they wereproved to belong to a remote pre-historic period, and had beenpreserved under exceptional circumstances in dry earth. Therewas no longer any hope of finding Grypotherium alive.

After the demonstration Mr. G. C. Crick exhibited to theparty a newly-acquired plaster cast of the largest knownammonite, 6 ft. 8 in. in diameter, from the Upper Cretaceous ofWestphalia. The original specimen is in the Provincial Museumat Munster, and has been described under the name ofPaclzydisClIS seppenradensis.PROC. GEOL. Assoc ., VOL. XIX, PART 3. 1905·J 9