48 C GEOLOGICAL SURVEY OP CANADA. 



Strophomena alternata, Conrad. One specimen. 



Murchisonia bellicincta, Hall. ( = M. major.) A large cast, precisely 

 similar to one from the locality last mentioned. 



Maclurea (near M. Bigsbyi, Hall). Two tolerably perfect casts of a 

 shell which may be an extreme variety of M Bigsbyi, but the 

 outer whorl is wider above, and more obliquely compressed 

 below, between the periphery and the umbilical margin, than 

 the corresponding parts of the shell of M Bigsbyi are. In a 

 figure of the latter species recently published by Prof. Whitfield, 

 the aperture is represented as a little higher than wide, whereas 

 in the most perfect of the two Macl ureas collected by Dr. Bell 

 at this locality the maximum width of the aperture is about 

 one-third greater than its height. 



Endoceras (Cameroceras) annulatum? Hall. Three distorted and imper- 

 fect examples of an Endoceras, which agree in most respects 

 with the definition of E. annulatum. The outline of their trans- 

 verse section is rather oval than circular, but this circumstance 

 may be due to lateral compression. 



Oncoceras, Nov. sp. One fine but somewhat distorted specimen. 



5. From the Junction of the Little and Great Churchill Eivers. 



Zaphrentis. Nov. sp. Two specimens, one of which is the same as those 

 from St. Andrews, previously mentioned. 



Columnopora c?ibrifo?'mis, Nicholson. A small but well-preserved 

 example. 



6. From Fort Churchill. (Loose.) 



Eridophyllum, Nov. sp. Identical apparently with that from the 



Second and Third Eapids of the Nelson. 

 Mhynchonella capax, Conrad. One very imperfect specimen. 

 Actinoceras Lyoni ? Stokes. A fragment of a siphuncle, consisting of a 



cast of four of the chambers. 



The fossils from localities Nos. 1 , 2, 3 and 4 are from limestones or 

 dolomites which evidently belong to the same geological horizon. On 

 stratigraphical as well as on palseontological grounds there is good reason 

 for supposing that these rocks represent the upper part of the Trenton 

 Limestone, and that they are the equivalents of the Galeua Limestone 

 of Wisconsin and Illinois. At Stony Mountain, Manitoba, they are 

 immediately and conformably overlaid by true Hudson Eiver rocks. 



