78 



THE ROYAL SOCIETY OF CANADA 



stones predominate in the lower part of the series and the shales in 

 the upper part." The conditions during the period of deposition there- 

 fore indicate a marine advance. The fossils are abundant throughout, 

 "occur both in the sandstones and shales, and frequently are specially 

 abundant in the calcareous nodules.* 



"The rocks" of subdivision C "form a synclinal in Alliford Bay 

 and fringe the north-eastern part of Maude Island, crossing it with 

 considerable width about the middle, and running thence to the south- 

 east end of South Island. They constitute the whole north shore of 

 Bearskin Bay and the greater part of Lina Island." It is evident 

 from the accompanying map that the localities from which Mr. Church 

 made his collections lie wholly within Dawson's subdivision C. Ar- 

 ranged in order of stratigraphie sequence, as nearly as possible, they 

 are : — 



No. 



5-6 

 4 

 3 

 2 

 1 



Collecting ";r()mi(L 



Maple Island 



North shore of Bear-skin Bay 



N-E. point of Maude Island 



Robber Point, Maude Island 



Alliford Bay '. 



Point on N.-^V. shore, Maude Island 



Approximate distance 

 above base of C. 



These stratigraphie positions, calculated from Dawson's map,t 

 appear to show that the fossils are mainly from the lower half of sub- 

 division C, which has a total thickness of 5,000 feet. As no great care 

 was exercised in noting the precise locality from which many of the 

 fossils were obtained, it is impossible to distinguish fanual horizons, 

 further than to say that the fossils from Alliford Bay and Maude 

 Island represent the lower 900 feet of the sub-division, while those from 

 Bearskin Bay and Maple Island lie between the 1,200 and 3,000 foot 

 levels. These measurements take no account of the differences in 

 horizon at the base of the series due to progressive overlap, and it 

 appears that the waters encroached landward from the west, and that 

 the deposits of corresponding level are therefore older in the more 

 westerly part of the field. 



The new species described in this paper appear to belong entirely 

 to the lower of these two horizons, and unless otherwise placed, may ])e 

 taken as occurring on the shores of Maude Island. They are littoral or 

 shallow-water organisms, with the exception of the Cephalopoda, and 



*Ibid, p. 68B. 



tOcol. Surv., Can., Rep. Prog. 1878-9, p. 63 B. 



