SALTER, ARCTIC GEOLOGY. 535 



point of the new continent from whence fossils have been brought. 

 One of them is the — 



Encrinurus laDvis, before mentioned ; the other — 



46. Bellerophon nautarum, n. sp. (/. c, pi. 5, f. 20) ; so named 



in honour of the crews of the " Lady Franklin " and 

 " Sophia." 

 Returning to Barrow Strait, the ballast from Leopold's Island, 

 before quoted, yielded : — 



Favosites polymorpha. Abundant. 



Gotlandica. 



Fenestella, sp. Probably the same as above, No. 43. 

 Strophomena, sp. Same as No. 13. 

 Rhynchonella phoca. As above, No. 19. 

 sublepida, De Vern. var. 



47. , sp. With simple plaits ; distinct from' No. 20. 



The existence of this great formation of Upper- Silurian lime- 

 stone along the shores of Prince-Regent's Inlet is rendered all 

 but certain from the notes furnished by Prof. Jameson and Mr. 

 Konig in the Appendices to Capt. Parry's Voyages. From their 

 accounts the coasts are occupied by a " transition limestone " of 

 an ash-grey or yellowish and grey colour, often foetid, and some- 

 times crystalline or compact. It is described as filled with 

 Zoophytes and Shells, and in certain parts, ^s noticed by Mr. 

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

 of which are so comminuted that it might readily be mistaken for 

 a granular limestone. He also found in it the Chain-coral. 



Prof. Jameson gives a list of organic remains from Port Bowen, 

 which, by modernising the nomenclature of the fossils, would 

 agree well with those from the north shore of Barrow Strait, 

 and indeed he has himself identified them. And he mentions that 

 this same rock extends eastward to Cape York, Admiralty Inlet, 

 and even occurs at Possession Bay ; while in a southerly direc- 

 tion it was found as far as the Regent's Inlet was explored. We 

 have seen that a similar limestone occurs at Cape Walker, Russell 

 Island, and from the general low character of the shores that 

 stretch to the west (explored lately by Capt. Ommanney), it is 

 probably continued along them. 



The north-eastern shores of Lancaster Sound are composed, at 

 least in part, of igneous and crystalline rocks ; but from the 

 commencement of the table-land at Powell's Inlet all along the 

 coast to the Wellington Channel, a uniform appearance of the 

 shore (the cliffs appearing like fortifications) indicates the presence 

 of the same tabular strata of limestone. 



Dr. Sutherland, who is well acquainted with the appearance of 

 the limestone cliffs, and who had the advantage of communicating 

 with the different exploring parties, is without doubt of its con- 

 tinuity along this coast. 



Again, the limestone of Melville Island, according to Mr. 

 Konig, contains Favosites and TerehratulcB. 



Dr. Conybeare adds to them Cateniporce vca^ Caryophylliat ; and 

 this is just the aspect which the fossils of the limestone we have 

 described would present on a cursory examination. In Melville 



