558 



Annals of the Carnegie Museum. 



4. Rockland, Ontario. Twenty-five miles east of Ottawa on the 

 Ottawa River. 



Hebertclla iniperator, 

 Hebertella borea/is, 

 PIcBsioinys platys, 

 Camai-ota-cJiia plena. 



Raph istoin a sta niiii eu m, 

 Modiolopsis parvhiscula, 

 Orthoceras aiifcuor. 



5. Hog Back, three miles southeast of Ottawa. List given by Dr. 

 H. M. Ami in Report of the Geological Survey of Canada, 1899, sec- 

 tion J, page 139. 



FalteopJiycits ? sp. , 

 Lingula belli, 

 L i/igii la h II > v/ie/isis, 

 Lingula in ante Hi, or 



closely allied species, 

 Khynchonella plena, 

 Serpiilitcs s])., 

 Cyrtodonta brer'iiiseiila , 

 Cyrtodonta sp., 

 Jfodiolopsis parvinscula , 

 Plenrotoinaria calyx, 

 Troclionenia pail pern III, 

 Afiireliisonia sp., 



Cyclonema sp., 



Orthoceras cf. O. allunicttense, 



Orthoceras sp., 



Bathyiiriis cf. B. candatus^ 



Bathyiiriis cf. B. angelini, 



Asaphiis canalis, 



Bolbocephahis ? sp., 



Jsochilina aniiana, 



Briinitia sp., 



Scolithiis prolijicus Mss. , Ami, 



Protichnites / sparcus Mss., Ami, 



Coliininaria ? incerta. 



6. Hog Back, near Ottawa. Species collected by the writer at the 

 same locality as 5. The section exposed at the Hog Back measures 

 about thirty to thirty-five feet, and in it the faunules are found in the 

 following order, beginning with the lowest. 



H. F). I. Impure, shaly limestone, greenish in color, and very tough. 



Lingula lyelli Z2l, Ctenodonta pan^idens c. 



H. B. 2. Greenish shale without lime. 

 Ldngula lyelli c. 



H. B, 3. Tough, fairly pure buff limestone or dolomite. 



Lingula Ixelli c, Isotelus sp. ind. r. 



Caniarotcvchia plena a. 



Close to this section, but separated from it by a fault, was the fol- 

 lowing succession, whose relation to the first could not be determined. 



