302 WALCOTT 



Etcheminian ' series of New Brunswick and Newfoundland, 

 and because he gave much more consideration to the results of 

 theoretic biologic studies than to the already established strati- 

 graphic succession of the faunas ; and this was carried still 

 further when the Lower Cambrian (Olenellus zone) of the At- 

 lantic Province was referred to a pre-Cambrian Paleozoic ter- 

 rane.^ 



The name Olenellus is here used in the general sense given 

 it by me in 1888 at the Geological Congress in London. The 

 species O. hrdggej'i has been referred to the genus Hohnia^ but 

 it still remains in the Mesonacidse, a family of trilobites con- 

 fined, so far as known, to the Lower Cambrian fauna. No 

 attempt will be made in this article to discuss the faunas of the 

 Cambrian or their biologic relations, my object being to show 

 their stratigraphic relations and succession. The genus Proto- 

 lenus appears to occur stratigraphically between the Olenellus 

 and Paradoxides horizons, and it is probable that it will be 

 found associated with Olenellus below and with Paradoxides or 

 Olenoides above when we come to know more of the Cambrian 

 faunas. 



In the broad generalizations on the Cambrian system pub- 

 lished in 1891 there are many partial and tentative conclusions, 

 but the main points of the classification are fully outlined. Many 

 pages are devoted to unsolved problems. One of those for New- 

 foundland was stated as follows •} 



The determination of the relation of the Cambrian rocks of 

 St. Marys and Trinity Bays to the basal conglomerate in the 

 Manuels Brook section, to ascertain if a series of Cambrian 

 strata occurs between the lowest recognized Cambrian of Con- 

 ception Bay and Manuels Brook and the pre-Cambrian rocks of 

 Trinity and St. Marys Bays, as thought by the Newfoundland 

 geologists. If such a series be found its fauna should be care- 

 fully collected and studied with reference to its being basal 

 Cambrian or pre-Cambrian. 



A problem for New Brunswick^ reads : 



The clearer identification of the Lower Cambrian or Olenel- 



'A Paleozoic Terrane Beneath the Cambrian: Annals N. Y. Acad. Sci., 

 Vol. XII, pp. 41-56. 



» Bull. U. S. Geol. Survey, No. 81, p. 380. 

 ' I^oc. cit., p. 381. 



