REPORT OF THE STATE PALEONTOLOGIST 1901 559 



The results of these investigations leave no doubt that the 

 Tetragraptus zone of the Deep hill section, which is identical with 

 one of the Point Levis zones, is properly to be regarded as a 

 graptolite fades of the Beehmantown or Galciferons period. 



No attempt was made by Dr Ells to separate the various 

 graptolite zones of the Levis beds. Later, it was stated by Ami 1 

 that there exist well marked zones in different portions of the 

 series of the Levis strata, but their separation was not carried 

 out. It is, therefore, evident that the complicated stratigraphic 

 conditions under which the Levis beds are found in the Quebec 

 region do not invite or permit an establishment of the success 

 sion of their faunal zones. 



An attempt to accomplish this, however, by reference to the 

 well known succession in Europe, has been made by Dr R. Gur- 

 ley. 2 Dr Gurley states that he had the opportunity of studying 

 two different collections, with different faunas, from the Point 

 Levis shales. One of these, coming from a black shale, with 

 Dichograptus flexilis and Phyllograptus 

 ilicifolius var. as conspicuous members, is termed the 

 Main Point Levis zone and tentatively placed in the Lower Cal- 

 ciferous. It is with the fauna of this zone that the assemblage 

 described above as characterizing the lowest beds of the Deep 

 kill section, or those of the Tetragraptus zone, is identical. 



Mr G. F. Matthew has reported 3 the occurrence of the zone 

 with Dichograptus logani and Tetragraptus 

 quadribrachiatus, etc. in the St John basin, separated 

 from the Cambric zone of Dictyonema flabelliforme 

 by several hundred feet (175?) of shales whose fauna is unknown. 

 As the other zones seem to be absent in that region, it does not 

 furnish any clue to the stratigraphic relations of the Levis 

 zones. 



A more exact determination of the position of this zone in 

 the series of paleozoic formations has been possible in Scan- 

 dinavia and Great Britain. In England, the graptolite fauna 



1 G-eol soc. Am. Bui. 1890. 2: 492. 



2 Jour. geol. 1896. v. 4, no. 3, p. 302. 



3 Can. rec. sci. Oct. 1891; p. 3; Nat. hist. soc. Bui 10, p. 3. 



