Reports and Proceedings — Geological Society of London. 43 



1. Tertiary. — Sand, clay, gravel and conglomerate ; gypsum and rock-salt. 



2. Cretaceous. — Table land formation, saadstone, Kaolin, grit, and conglomerate ; 



clay and sandy beds -with gypsum, ironstones, sandstones, 

 limestones, and calcareous clays in horizontal beds. 



3. Devonian (?) — Claystones and conglomerates, skirting the J^'linders range and 



elsewhere. 



4. Silurian (?) — Limestones, clayslates and shales, quartzites, calcareous slates, 



sandstones, siliceous and conglomeratic limestones. 



5. Metamorphic. — Clay slates, mica slates, and schists, with granite dykes. 



6. Granite and Greenstone. 



Gold is obtained at Echunga in drifts and alluvial gullies. 

 At Woodside, auriferous quartz-reefs are worked. Eleven other 

 localities are recorded where alluvial gold-mining and quartz-crush- 

 ing has been carried on. " The great drawbacks are however the 

 scarcity of water for washing purposes, the inaccessibility of the land 

 to prospectors, through its having been alienated from the Crown, 

 and the remoteness of some of the localities from civilized life and 

 the consequent difficulty of obtaining supplies." 



Copper- mining appears to form an important item in the mineral- 

 resources of this Colony. Thirty-two mines are enumerated, five of 

 which are being worked at the present time. In 1882 the export of 

 copper was 3,647 tons, valued at £249,884 ; copper ore, 1,294 tons, 

 value £195,686. 



Lead ore. Galena, Cerusite, Bismuth, Antimony and Nickel, Cobalt, 

 Eutile, Manganese, Tin and Graphite are among the minerals found 

 more or less abundantly, but in the absence of any returns they 

 cannot yet be treated as of commercial importance. A list of 

 Minerals by Mr. G. Goyder, jun., completes this excellent report. 



In his summary addressed to the Commissioner of Crown Lands, 

 Mr. Henry Y. Lyell Brown mentions the appointment, as Assistant 

 Geologist, of Mr. Harry P. Woodward, E.G.S., who arrived out in 

 the Colony in July, 1883. After mapping part of the Mt. Lofty 

 range, and the gold-field reserves of Kutipo and Noarlunga, he was 

 sent in December, 1883, as Naturalist, with Mr. Poeppel's expedition 

 to Survey the Boundary-line between Queensland and South 

 Australia, on which service he was engaged until September, 1884, 

 when, owing to the want of transport in this barren Sand-hill 

 District, he returned to Adelaide to resume his regular Geological 

 Survey work under Mr. H. Y. L. Brown. 



S,EJPOi2-TS Ji^lSTJD IFiaOGEIBIDIZsrOS. 



Geological Society of London. 



I.— November 19, 1884.— Prof. T. G. Bonney, D.Sc, LL.D., F.R.S., 

 President, in the chair. The following communications were read : 



1. " Note on the Eesemblance of the Upper Molar Teeth of an 

 Eocene Mammal (Neoplagiaulax, Lemoine) to those of Tntylodon." 

 By Sir Richard Owen, K.C.B., F.R.S., F.G.S. 



In this paper the author referred »to the genus Neoplagiaulax, 

 described by M. Lemoine from the Eocene of Kheims, as presenting 

 premolars so like those of the Mesozoic genus Plngiaulax as to have 

 suggested the above name, while the true molars in the upper jaw 



