on Geology of Portion of Province of Quel* 1 1 1 



from these rocks ifi doubtful." This statement is repeated on 

 page 81K. 



When first reading the description of the Point Levis rocks 

 in 1874, 1 was puzzled by the mixing of the faunas in the lists 



gablished by Mr. Billings and the statement made by Sir Win. 

 ;. Logan, tiiat the fossils were from the matrix. On reaching 

 Quebec, in August, L889, I took the first opportunity to 

 examine the lowest bed of limestone conglomerate back of St. 

 Joseph de Levis and northwest of the Catholic cemetery. Dr. 

 Ells accompanied me. As we crossed the ridge I picked up a 

 loose bowlder full of Potsdam or Upper Cambrian fossils. 

 A second bowlder was found embedded in the matrix and then 

 Beveral more, some of which were three feet in diameter. The 

 matrix is a hard, gray, impure limestone that occurs at this 

 point in a solid band, that we traced 500 feet or more. In the 

 matrix I found the Calciferous fauna was represented by 

 Oboldla sp. \ OrthiswpA OamereUa calcifera Billings, Eccu- 

 Uomphalus canadensis Billings, Ecculiomp/talus intortus Bil- 

 lings, Ophileta comjpianata vanuxem, Pleurotomaria cana- 

 densis Billings, Pleurotomaria sp.S Orthoceras, 4 sp. undet, 

 polio Billings, Geraurus eryx Billings, Bathyurus 

 bituberculatus Billings, Bathyurus auadrdtus Billings. 



In a bed of limestone, fifty feet higher in the section, I 

 found, in addition to the preceding, the following: Bathyurus 



dia Billings, Bathyurus oblongus Billings, Amphion Galeyi 

 Billings. In" the succeeding band of limestone conglomerate 

 Orih is porambon ites Pander occurs. 



A large number of specimens were obtained from the 

 bowlders embedded in the limestone containing the fossils of 

 Calciferous age, among which I have identified Gamerella 

 calcifera Billings (?), Agnostus americanus Billings, Dicelo- 

 magnificus Billings, D. Oweni Billings, D. Belli Wl- 

 lings, Ariohdlus subelavatus Billings, Menocephalus ? Sedg- 



cki Billings, and Ittamurus illamoides Billings (sp.). Other 



ecies occur, but the preceding list is sufficient, to indicate the 

 fauna of the Upper Cambrian or Potsdam zone 



Dr. Ells accepted the view that the Calciferous fauna occur- 

 red in situ in the matrix of the conglomerate, and that the 

 bowlders containing the Potsdam fauna were derived from 

 preexisting strata." In the next band of conglomerate, above 

 that which forms the ridge on the north side of the cemetery, 

 the matrix also carries Calciferous fossils, and they are also 

 abundant in the bowlders. In a search of two days I failed to 

 find a Potsdam fossil at this horizon. From Dr. Ells 1 learned 

 that nearly all the fossils described by Mr. Billings came from 



* This view was added in a foot note at the close of Mr. Ami's list of the spe- 

 cies on Dr. Klls's return to Ottawa in October. 



