308 WALCOTT 



This is one of the most important horizons in the Lower 

 Cambrian of Newfoundland (Smith Point limestone). 

 It is very persistent about Trinity Bay, and it occurs, 

 although much thinner, at various exposures in Concep- 

 tion, St. Marys and Placentia Bays, The upper 24 feet 

 at Smith Point is practically solid limestone layers. 

 The lower layer of limestone, i foot in thickness, is 

 separated by 2 feet of reddish shale in which 3 inches 

 of limestone occurs. 

 Fossils : 



In the upper 6 inches of the top layer of limestone nu- 

 merous fragments of Ohnelhis {/I.) 6 ro£-£-eri and So- 

 lefwpleura ? occur. About 3 feet below this, in the next 

 bed of limestone, immense numbers of Hyolithes friftceps 

 are found in association with the fauna that marks this 

 limestone band wherever it is found. The following 

 species were collected in a few hours : 

 Iphidea labradorica {Kuto7-glna granulatayi.^ 

 FordiUa troyensis 

 Scenella retictdata f 

 Randomia aurorce 

 Hele?iia bella 

 Orthotheca pitgeo 

 Hyolithes princeps 

 Coleoloides typicalis 

 Hyolithellus ?n leans? 



Feet. 



26. Green argillaceous shale 23 



2f. Massive stratum of nodular limestone, divided into 18 

 inches of a pinkish limestone, and 3 feet of purple to a 



pink, mixed with purple argillaceous shale 414 



Fossils : 



Coleoloides typicalis. 

 2g. Green argillaceous shale in massive bands, with numerous 

 small pinkish limestone nodules scattered irregularly on 

 the line of bedding. At 51 feet from the base the lime- 

 stone nodules increase in number and size, and form the 

 greater part of a layer 2 feet in thickness. Above this 

 the reddish-purple and green shales occur in bands vary- 

 ing in thickness 62 



Fossils : 



Hyolithes rugosus Matt. ? 



Coleoloides 



Urotheca pervetus Matt. 



Crustacean, n. g., n. sp. 



