48 C GEOLOGICAL SURVEY OF CANADA. 



Strophomena alterriata, Conrad. One specimen. 



Murchisonia hellicincta, Hall. (z=M. major.) A large cast, precinely 

 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 

 %ure 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 Maclureas collected by Dr. Bell 

 at this locality the maximum width of the aperture is about 

 one-third greater than its height. 



Endoceras (Cameroceras) annulatumf 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. 



6. From the JtJNCTiON of the Little and Great Churchill Rtvers. J 



■ ■ A 



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

 from St. Andrews, previously mentioned. 



Columnopora cribriformis, Nicholson. A small but well-])reserved 

 example. 



6. From Fort Churchill. (Loose.) 



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



Second and Third Eapids of the Nelson. 

 Rhynchonella capax, Conrad. One very imperfect s])ecimen. 



Acfinoceras 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 pala^ontological 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 l)y true Hudson Eiver rocks. 



