282 Reports and Proceedings — Geological Society of London. 



presented by the genus Vectisaurus were stated to be as follows : — 

 Ilium with a long compressed ant-acetabular process, having its 

 greatest transverse extent in a vertical plane, and strengthened by a 

 strong ridge produced from the sacral crest. Vertebras in anterior 

 dorsal region having opisthoccelous centres, their lateral surfaces 

 longitudinally concave, transversely gently convex, meeting below 

 in a blunt keel. 



3. " On the Cudgegong Diamond-field, New South Wales." By 

 Norman Taylor, Esq., of the late Geological Survey of Victoria ; 

 communicated by E. Etheridge, Esq., Jun., F.G.S. 



The author described in detail the various spots at which diamonds 

 have been found in this locality. They occur in river-drift, associated 

 with gold and other gems. The drifts in the district are at least six 

 in number. The oldest is considered by the author to be Upper 

 Miocene or Lower Pliocene ; the next Middle Pliocene ; others Upper 

 Pliocene, Pleistocene, and Eecent. Between the Middle and Upper 

 Pliocene flows of basalt lava took place, which have sealed up much 

 of the older drifts. Diamonds are found in the oldest drift and, pro- 

 babty by derivation from it, in the newer. Gold, metallic iron, wood, 

 tin, brookite (?), iron-sand, quartz, tourmaline, garnet, pleonast, 

 zircon, topaz, sapphire, ruby, and corundum are also found. The 

 author then considers the question of whether the diamonds are 

 derived from some of the igneous or sedimentary formations (from 

 Upper Silurian to Mesozoic) which have contributed to the drift ; 

 and concludes, from a variety of reasons, that the diamonds have 

 been formed in situ in the older drift. 



4. " On the Occurrence of the Genus Diihyrocaris in the Lower 

 Carboniferous, or Calciferous Sandstone Series of Scotland ; and on 

 that of a second species of Anthrapalcemon in these beds." By E. 

 Etheridge, Esq., Jun., F.G.S. 



The author, in the first place, referred to the extension of the 

 range in time of the genus Diihyrocaris, by the discovery of nume- 

 rous fragmentary remains of D. testudineus, Scouler, in the Calcife- 

 rous Sandstone or Lower Carboniferous Series of the south of 

 Scotland, about the horizon of the Wardie Shales near Edinburgh, 

 and in the Cement-stone group of Eoxburghshire. 



A further and more complete description of Anthrapalcemon 

 Woodicardi, Eth.. jun., was then given, in which the characters of 

 some of the appendages were more particularly alluded to, such as 

 the eyes, inner and outer antennas, and first pair of ciliate appen- 

 dages, thus placing the stability of the species beyond a doubt. 



The paper concluded with the description of a second species of 

 Antltrapalosmon, from the Lower Carboniferous rocks of Eoxburgh- 

 shire, for which the author proposed the name of A. Macconochii, 

 after the discoverer of the specimen. This remarkable species, of 

 which the carapace is at present the only portion known, differs 

 essentially in the characters of this part of the body from all the 

 other described species of the genus. 



