112 



rocks of the Hudson River or Cincinnati group of southern Ohio and 

 elsewhere.'' At the summit of the mountain these limestones pass into- 

 rich cream coloured, yellow or greyish white dolomites, but, as the writer 

 had then seen no fossils from the latter, no opinion was expressed as to- 

 their age. A collection of the fossils of this locality, made by Mr. T. C. 

 Weston in 1884, consists of about twelve species from these dolomites, 

 which it will be convenient to distinguish as the upper beds, and of an 

 unusually large number of those of the immediately underlying impure 

 limestones or lower beds. This collection and a small series of fossils 

 from the upper beds, obtained by Mr. Tyrrell in 1888, show that the 

 fauna of the upper beds, and hence that of the whole of the rocks at Stony 

 Mountain, are probably referable to the Hudson River or Cincinnati 

 formation, which has not yet been definitely recognized at any other 

 locality in Manitoba. 



The Polyzoa and Ostracoda contained in Dr. EUs's and Mr. Weston's col- 

 lections have been identified or described by Mr. E. O. Ulrich in the second 

 part of the "Contributions to the Micro-Palseontology of the Cambro- 

 Silurian rocks of Canada," published by this Survey in 1889, but no com- 

 plete list of the fossils from Stony Mountain has yet been prepared. The 

 present paper is an attempt to supply this deficiency, and consists of a 

 systematic list of all the species from that locality which are now repre- 

 sented in the Museum of the Survey. As many of these fossils are common 

 and well known species, it is not thought desirable to give an exhaustive 

 list of synonyms of each, but only such references as are likely to be 

 useful to students of Canadian geology. 



Bythoteephis (like £ succulens, Hall). 



Cii. Buthotrephin SMCCTtfen.v, Hall ,. 1847. Pal. N. York, vol. I., p. 62, pi. 22, 



figs. 2, a-b, 



A single specimen, which is too imperfect to be determined satisfacto- 

 rily but which agrees fairly well with the orginal descripcion of this 

 species, was collected from the summit of the upper beds by Mr. J. B. 

 Tyrrell in 1889. 



