Geological Society/ of London, 291 



of Nova Scotia from east to west, while another series of low broad 

 anticlinals of much later date have a meridional course. At the 

 intersection of these anticlinals the gold districts are situated, be- 

 cause there denudation has best exposed the upturned edges of the 

 auriferous beds of quartz, and rendered them accessible, sometimes 

 exposing also the underlying gneiss. Plans of Waverley and Sher- 

 brooke gold districts were exhibited, showing the outcrop of the 

 edges of the slates and auriferous beds of quartz in semi-elliptical 

 forms, with the gneiss at the base of the ellipse. On this ground 

 it was suggested that a correct mapping of the gneisses of Nova 

 Scotia would have an important influence on the development of the 

 mineral resources of the province. 



A plan of some of the lodes in the Waverley gold district showed 

 the result of operations in 1869, subsequently to the publication of 

 a geological map and sections of the district furnished to the De- 

 partment of Mines by the author in 1868. Citations were made 

 from the annual reports just issued by the Chief Commissioner of 

 Mines, and of the Inspector of Mines, confirming the correctness of 

 the author's plans exhibiting the geological structure of Waverley, 

 which is a type of all the Nova Scotian gold districts. 



Discussion. — Principal Dawson spoke in confirmation of tlie fact that the 

 Palaeozoic rocks are underlain hy Laurentian gneiss, &c., quite to the eastern coast 

 of British North America, and stated that the same relation occurred in New- 

 foundland, and had heen traced southwards into Massachusetts. He confirmed 

 Mr. Hind's views generally, and stated that the Lower Silurian of Nova Scotia 

 includes no great fossiliferous limestone, like that of the interior of North America. 

 The supposed Eozoon, discovered by Dr. Honeyman, was probably distinct from E. 

 canadense, but was certainly a Foraminiferal organism allied to Eozoon ; but as 

 Eozoon bohemicum is of later date than E. canadense, the presence of Eozoon did 

 . not necessarily indicate Laurentian age. ' 



Prof. Ramsay suggested that other organisms besides Eozoon aided in building 

 up these great calcareous masses. He inquired as to the mode of occurrence of: 

 gold, and suggested that the gold is obtained at the anticlinals merely because the 

 exposure is better, and that it will be found to pervade the synclinals also. 



Mr. Henry Robinson had visited the Waverley district in company with Prof, 

 Hind, in the winter of 1868, at which time the mining on the lodes referred to in 

 the map before the Society was at a standstill, the lodes having been lost by reason 

 of a fault. He thought it was very satisfactory to find that the explorations of 

 Prof, Hind, and the theoretical position which he assigned to the lodes, had been 

 completely verified, Mr. Robinson also stated that gold is being mined in the 

 synclinals by sinking shafts and driving cross-cuts. 



Mr, Hind remarked that all the Lower Silurian in Nova Scotia was auriferous, 

 and that the gold was derived from the underlying Laurentian rocks. He stated 

 that Sir W. E. Logan had indicated an auriferous zone in the Laurentian of 

 Canada. Gold was finely distributed in the slates of Nova Scotia, as in Victoria, 

 in the neighbourhood of lodes, according to Mr, R. Brough Smyth. 



Geological Society of London, — II. May 11, 1870. — Joseph 

 Prestwich, Esq., F.E.S., President, in the Chair. The following 

 communications were read: — 1. "Notes on some specimens of 

 Lower-Silurian Trilobites." By E. Billings, Esq., F.G.S., Palaeon- 

 tologist of the Geological Survey of Canada. 



(1) The author first described a specimen of Asaphis platyce- 

 phalus, in which the hypostome was not only preserved in situ, but 

 also the remains (more or less well preserved) of eight pairs of legs, 



