284 Reports & Proceedings—Geological Society of London. 
antiquus, an extinct Pleistocene Bison, found throughout the United 
States, which differs from the living American Bisons with larger 
horn-cores and differing markedly in their angle of insertion. 
11. Catrrorntan Puiocenz.1—The paper is a valuable contribution 
to the later Tertiary stratigraphy of California, containing as it does 
descriptions of many sections with very full faunal liste, which are 
carefully analysed, the percentage of species restricted to a given 
formation and those ranging through into others being well 
brought out. 
12. Miocenr Verreprates rrom Nevapsa.*—In this paper Professor 
Merriam describes an important but unfortunately fragmentary fauna 
of Upper Miocene age from West Nevada, and compares it with other 
groups of mammals of similar age in the State. The most interesting 
types are Hypohippus nevadensis, a species with remarkably primitive 
milk molars representing a new sub-genus Drynohippus, and Tetra- 
belodon sp., an interesting Mastodon with a symphysis of a length 
intermediate between typical Tetrabelodons and ordinary Mastodons. 
REPORTS AND PROCHEDINGS.- 
I.—Gerotocicat Socrery or Lonpon. 
May 10, 1916.—Dr. Alfred Harker, F.R.S., President in the Chair. 
The following communications were read :— 
1. ‘‘ Carboniferous Fossils from Siam.” By F. R. Cowper Reed, 
MAR ScD EGas. 
The fossils described in this paper were collected by the Skeat 
Expedition from Cambridge in the year 1899, at a locality called 
Kuan Lin Soh, in the Patalung district of Lower Siam, and were 
briefly mentioned in the ‘Reports’ of the British Association for 
1900 and 1901. ‘hey occur in a pale, fine-grained, jointed siliceous 
rock with an irregular or sub-conchoidal fracture. The field relations 
of the beds have not been recorded. ‘he general facies of the small 
fauna which the available material has yielded indicates a Lower 
Carboniferous age for the beds, and the affinities of the species seem 
to be European and suggest the Culm Series. In 1913 Mr. J. B. 
Scrivenor, on the strength of the earlier determination of the fossils, 
referred the beds to his Raub Series of the Malay Peninsula, and the _ 
author draws attention to other Carboniferous beds in South-Kastern 
Asia. 
2. ‘‘The Lurgecombe Mill Lamprophyre and its Inclusions.” By 
Herbert Gladstone Smith, B.Sc., F.G.S. 
A lamprophyre-dyke intrusive into Culm Shales has recently 
heen exposed at Lurgecombe Mill, near Ashburton (South Devon). 
The rock is compact and fine- erained, small crystals of biotite 
1 Bruce Martin, ‘‘ The Pliocene of Middle and Northern California ’’: op. 
cit., No. xv, pp. 215-59. 
2 J.C. Merriam, ‘‘ Tertiary Vertebrate Fauna from the Ada Mountain Region 
of Western Nevada ’’: op. cit., No. xili, pp. 161-98. / 
(edat 
