1855.] 



ISBISTER — NORTH AMERICA, ETC. 



505 



tions bring us down. The extreme points here indicated are Lake 

 Temiscamang, in lat. 47° 19' N., and the shores of Wellington Chan- 

 nel, between n^ and 78° N., giving the enormous range of 30 degrees 

 of latitude, over which, as far as our present information reaches, the 

 Silurian formation extends uninterruptedly without any important 

 variation, so far as is known, either in its mineralogical constitution 

 or its stratification. The fossils from this district hitherto submitted 

 to Mr. Salter's examination belong exclusively to the Upper Silurian. 

 They are comprised in the following list ; and most of them are 

 figured in the Appendix to Dr. Sutherland's Journal of Capt. Penny's 

 Expedition. 



Crmtacea. 



1. Encrinurus laevis, Angelina 



2. Proetus, sp. 



3. Leperditia Balthica, Hisinyer sp., 

 var. arctica, Jones. 



Mollusca. 



4. Lituites, sp. 



5. Orthoceras Ommaneyi, Salter. 



6. 7. , 2 species. 



8, 9. Murchisonia, 2 sp. 



10. Euoraphalus, sp. 



11. Bellerophon nautarum, Salter. 



12. Modiola (or Modiolopsis). 



13. Strophomena Donnetti, Salter. 



14. , sp. 



15. Orthis. 



16. Spirifer crispus, Linn. sp. 



17 



18 

 19 

 20 

 21 

 22 



sp. 



Chonetes lata, Von Buck ? 



Pentamerus conchidium, Dalm. 



Rhynchonella Phoca, Salter. 



Mansonii, Salter. 



sublepida, De Fern. 



23, 24. , 2 sp. 



25. Atrypa reticularis, Linn. sp. 



26. Actinocrinus, sp. 



Encrinites. 



27. Crotalocrinus, sp. 



Corals. 



28. 

 29. 

 30. 

 31. 

 32. 

 33. 

 34. 

 35. 



Ptychophyllum. 



Strephodes Pickthornii, Salter. 



? Austini, Salter. 



Favistella reticulata, Salter. 



Franklini, Salter. 



Fenestella, sp. 



Favosites polymorpha, Goldfuss. 



Gothlandica, Linn. sp. 



36, 37. , 2 sp. 



38. Columnaria Sutherlandi, Salter. 



39. Halysites catenulatus, Linn. sp. 



40. Syringopora, sp. 



41. Heliolites (Porites). 



42. Cystiphyllum, sp. 



43. Cyathophyllum, sp. 



44. Clisiophyllum, sp. 



45. Aulopora, sp. 



46. Coenites (Limaria), sp. 



47. Calophyllum pliragmoceras, 



Salter. 



48. Arachnophyllum Richardsonii, 



Salter. 



Mr. Konig describes the limestones from which these remains 

 have been obtained as of an ash-grey or yellowish and grey colour, 

 often foetid, and sometimes crystalline or compact, strongly resem- 

 bling the Transition limestones of Gothland, and some of the foetid 

 varieties of the Mountain Limestone of Derbyshire. He mentions 

 also that it is filled with zoophytes and shells ; and in some parts is 

 quite made up of the detritus of Encrinites, the fragments of which 

 are so comminuted that the rock might readily be mistaken for a 

 granular limestone. 



A small collection of fossils * recently procured by the writer from 



* The fossils were collected by Dr. Roderick Kennedy, the Medical Officer at 

 Moose Factory. 



