314 THE CANADIAN NATURALIST. [Aug. 



CEPHOLOPODA. 



Orthoceras proteiforme, Hall, and var. lineolatum. 



" strigatum, Hall. 



Cyrtoceras Juvenalis, Billings. 



" macrostomum, Hall? or a new species. 



CRUSTACEA. 



Asaphus platycephalus, Stokes. 

 Calymene Blumenbachii, Bronsrniart. 

 Cheirurus pleurexanthemus, Green. 

 Trinucleus concentricus, Eaton. 



ENTOMOSTRACA. 

 Leperditia Canadensis, var. — rare. 



ANNELIDA. 

 Serpulites dissolatus, Billings. 



(66 species). 



REVIEW. 



Geology of New Brunswick. 

 {Continued from page 239.) 



One of the most important points in Prof. Bailey's Report, is 

 the working out of the relations of the metamorphic rocks under- 

 lying the Devonian plant beds of St. Johns ; and which, it now 

 appears, constitute a series descending even to the horizon of the 

 Laurentian. The following extracts relate to the Portland group, 

 supposed to be Laurentian, the Coldbrook group in the horizon 

 of the Huronian, and the Portland group, which yields Primordial 

 fossils, 



" Portland Group. — Age. — It might readily be supposed that 

 the extreme metamorphism exhibited by the rocks of the Portland 

 group would be accepted as conclusive evidence of their great anti- 

 quity. Indeed the fact of such antiquity could scarcely have been 

 doubted, were it not for the intimate association and almost entire 

 conformability between the beds of this and the overlying groups, 

 which have heretofore induced all the observers who have examined 

 the district to link them in a single series. As the latter are un- 

 questionably of Upper Devonian age, the beds of Portland were 

 supposed to represent either a portion of the lower division of the 

 same formation, or possibly the upper part of the Silurian. Dr. 

 Dawson alone, while still adopting the latter view, called attention 

 to the great resemblance between these rocks and those of the great 



