256 THE CAMBRIAN. [bull. 81. 



Feet. 



2. White and reddish quartzite, in beds of from 1 to 3 feet thick, interstratified 



toward the bottom with a gray arenaceous dolomite, weathering yellowish 

 brown 100 



3. White and reddish quartzite, in beds of from 1 to 3 feet thick, iuterstratified 



with greenish micaceo-arenaceous shale, constituting about one-half the 

 amount , 90 



4. Gray, pure limestone, in beds of from 1 to 3 feet thick, marked with a few 



reticulating strings of yellowish-weatheriug dolomite. The rock is a mass 

 of commiuuted organic remains, among which are Paradoxides vermontana, 

 and undetermined species of Bathyurus and Salterella, as before 20 



5. Blackish blue, soft shale, interstratified with gray yellow-weathering lime- 



stone, probably magnesian, in beds of 1 or 2 inches thick. The quantities 

 ofshaleaud limestone are about equal, and the whole is intersected by 

 reticulati ng strings of calc-spar 35 



6. Gray, pure limestone, composed of comminuted organic remains, belonging 



to Paradoxides, Bathyurus, and Salterella, as before 27 



7. Bluish black, soft shale, interstratified with gray yellow-weathering dolo- 



mitic bauds, as before __ 60 



8. Gray, pure limestone, probably composed of comminuted organic remains as 



before; underlaid by bluish black shale, inclosing nodules of blue com- 

 pact limestone, some of which weather yellowish-brown, and are prob- 

 ably magnesian .. 13 



9. Bluish black, soft shale of the same character as beforej interstratified with 



a few beds of quartzite 68 



623 



Total 1,711 



I examined the species of Bathyurus referred to in No. 1 of Division 

 B, and also some other fossils labeled as coming from Bonne Bay, and 

 there can be no doubt that some mistake was made in labeling the 

 specimens, for they certainly belong to the Trenton fauna and could 

 not have been associated with the Lower Cambrian fauna of the sec- 

 tion. All the Paradoxides referred to belong to the genus Olenellus or 

 Mesonacis aud several of the specimens of Bathyurus to the genus 

 Protypus. If the section was correctly measured and the Cambrian 

 fossils occur as mentioned all the strata belong to the Lower Cambrian, 

 and the fauna is a part of the Georgian fauna of the Cambrian. From 

 the accessible data I am not able to discover that the Upper Cambrian 

 or Potsdam fauna has been found on the northwest coast of Newfound- 

 land or on the Labrador shore. 



SOUTHWESTERN NEWFOUNDLAND. 



On the u Map showing the distribution of the Silurian and Carbon- 

 iferous Formations (etc.) in St. George's aud Port au Port Bays, New- 

 foundland," by Dr. Alexander Murray, 1873-74, a considerable area is 

 designated as Potsdam that is continued north into the valley of the 

 II umber. The reason given for the identification of the Potsdam Ter- 

 rane, in the Reports of the Geological Survey of Newfoundland for 

 1873-'74, 7 75, is that the strata placed within it are subjacent to the beds 

 containing fossils of the Calciferous formation of the Jjower Silurian, 



