CO 



The Calciferous species, which are certainly found in the Levis formation, 

 are Lingula Mantelli, Camerella calcifera, and PJcurotomnria calcifcra. 

 There are, besides these, a few -whicli I do not consider to be positively 

 identified with Calciferous species, but which, nevertheless, in such speci- 

 mens as have been collected, aiiice so well with the figures in the Pal. N. 

 Y., that it would be unsafe to jiivc them new names. They have been 

 referred by me heretofore to Ojiliilda unla)i(jiilnia, Maclurea matutina, 

 31. sordida and lioljiea dilucida. 



Of Chazy species we find, at Phillipsburgh, the plates of a Cystidean, 

 which I cannot distinguish from tlmse of PahrnruKtites tcnuiradiatua, a 

 peculiar and remarkable fossil, and highly characteristic of the Chazy 

 limestone. It is, proliably a distinct species, but in detached j^lates it is 

 imposssible to point out any diflercnce. Camerella varieois is also common 

 to the Chazy and Lc^vis fauna3. The remarkable genus Calatldum is re- 

 presented in the L(;vis formation by C. peiintnsum, and in the Chazy by 

 0. Ceomdensis. This genus commences in the (Juicilerons, and runs up 

 to the Chazy. Stenopora fibrosa can scarcely be mentioned as a charac- 

 teristic fossil, but it is found in beds below the Levis, and passes upwards 

 to the upper Silurian. There are no species common to the Levis and 

 Trenton faun£E, except the one last mentioned. 



It will be seen by referring to Art. G, p. 207 and its continuation, 

 p. 361, that in ISTewfoundland the L('\is formation does not there imme- 

 diately overlie the true Calcii'rrous, but is separated therefrom by two 

 other series of strata of cousideralile inniurtance. The first of these, con- 

 sisting of Divisions I, K, L, iM, is 1084 feet in thickness, and holds a faima 

 which is, upon the whole, distinct from that of the Levis formation. The 

 trilobites are : 



Bathyurus 1 species. 



Bathyurellus 1 " 



Asaphus 1 '= 



Illffinus 2 " 



AmpbioQ 1 " 



7 



Of tliese, Ascqjltiis cnnalis and Ampldon Barrenidei occur in the Ll'vIs 

 formation. Ortliis Eleetra is also found in these lieds ; but all the other 

 fossils are either new species, or S]iecies that occur in the Chazy and Cal- 

 ciferous. Overlying this series of strata is another 277 feet in thickness, 

 with a different fauna, the details of ^Yllich will be found at the place cited. 

 Then follows 700 feet of sandstone, overlying which is the Li^vis formation, 

 at Cow Head. It would thus apjiear that the rocks at Point Le^is not 

 only overhe, but, also, when the series is complete, are at least 2000 feet 

 above the true Calciferous. That so many trilobites belonging to the 



