250 



CONTRIBUTIONS TO CANADIAN PAL7E0NT0L0GT. 



Mackenzie Eiver, at " Grand View," forty five miles 

 below the "Eamparts." 



Productella spinulicosta. i Proetus Haldemani. 



A try pa reticularis. | 



According to ]\[r. McConnell, a section of the Devonian roclts in the 

 Mackenzie Eiver district, in descending oi'der, would be somewhat as 

 follows: — 



1 . Upper limestone ( about) ^00 I'eet. 



2. Greenish and l)luisli sliales, allernatini; with 



limestone ( about) 500 feet. 



;'. Greyish limestone, iuterstratitied with dolo- 

 mites, the lower part of which may be older 

 than the Devonian 2000 feet (or more. ) 



The whole of the fossils referred to in this Report are fi'om the uppei- 

 part of the middle division of this section. Although some of the locali- 

 ties* at which these fossils were collected are very far apart, the wi'iter 

 is informed by Mr. McConnell that the lithological characters and strati- 

 graphical relations of the shales and limestones at each are almost 

 identical. The fossil faunse at the whole of those localities seem to 

 show similarly close relations, and it is most probable that all the 

 species in the foregoing lists ai-e from jn-actically the same geological 

 horizon. 



An analysis of these lists shows that twenty two of the S])ccies are 

 found also in the Hamilton Formation of Ontari(j or the State of New 

 York. 



These are: — 



Astrasospongia Hamiltonensis. Cerampora Huronensis. 



Aulopora serpens. Crania Ilarailtoniie. 



Streptelasma rectum. Chonotes Logani, var. Aurora. 



Pachypora cervicornis. Strophodonta demissa. 

 Alveohtes Rccmeri. " porplana. 



Spirorbis omphalodes. Productella spinulicosta. 



" Arkonensis. Atrypa reticularis. 



Cornuhtes (Ortonia) sublicvts. Cyrtina Plamiltouensis. 



Ilederella Canadensis. Pterinea llabellum. 



Ascodictyon stellatum. Actinopteria Boydii. 



Paleschara quadrangularis. Proetus Haldemani. 



* The Kiimparts, on the Moclfenzie, fur in.stance, are 570 miles from the loeality on the Hay 

 Kiver at whieh foflslia were eolieetec], and ne;i,riy 1,000 miles from La Saline on the Athaliasca. 



