179 



Lake Winnipeg, at the mouth of the Little Saskatchewan, Dr. R. Bell, 

 1874, one specimen, and D. B. Dowling, 1880, two specimens; about five 

 miles north of Clark's Point, D. B. Dowling, 1891, two specimens; Big 

 Grindstone Point, J. B. Tyrrell, 1889, one specimen; Selkirk Island, north 

 of the Saskatchewan, D. B. Dowling, 1891, one specimen; west shore of 

 the lake, opposite the north end of Selkirk Island, D. B. Dowling, 1891, 

 two specimens; and First Limestone Point nofth of the Saskatchewan, 

 D. B. Dowling, 1891, two specimens. 



An imperfect but characteristic example of this species was collected 

 by Dr. R. Bell, in 1879, from a loose piece of limestone at Fort Churchill, 

 Hudson's Bay. 



Rhynchotrema in^quivalvis, Castelneau. (Sp.) 



Spirifer incequivalvis, Castelneau 1843. Essai sur le Syst. Silur. de I'Araer. 



Septentr., p. 40, pi. 14, fig. 8. 

 Atriipa increbescens {Tpartim), tiaXl 1847. Pal. N. York, vol. I., pp. 146 and 



289, pi. 33, figs. 13, a-h. 

 Rhynchonella inerebescens (partim), Billings . 1856. Canad. Nat. and Geol., vol. I., p. 207, 



figs. 11-14. 



Billings 1863. Geol. Canada, p. 168, fig. 153. 



Hhi/nchotrema inosquivalvis, Winchell and 



Sehuchert» 1893. Lower Silur. Brach. Minn., p. 459, pi. 



34, figs. 9-25. 



Lower Fort Garry, Dr. R. Bell, 1880 : two specimens. 



Punk Island, Lake Winnipeg, Professor H. Y. Hind, 1858 : two speci- 

 mens. A specimen which is probably referable to this species, but which 

 has the beak of the ventral valve broken off, was collected at Cat Head, 

 Lake Winnipeg, by Mr. Weston in 1884. 



Rhynchonella Anticostiensis. Var. 



Rhynehonella Anticostiensis ? White&ves . . . .ISSO. Geol. Surv. Canada, Rep. Progr.„ 



1878-79, p. 47 c. 

 Cfr. Rhynchonella Anticostiensis, Billings ... 1862. Geol. Surv. Canada, Pal. Foss., vol. 



I., p. 142, figs. 119, a-c. 

 ...1863. Geol. Canada, p. 211, figs. 212, a-c. 

 Cfr. Rhynchonella(? ) .4m«icosStensis, Winchell 



and Sohuchert 1893. Lower Silur. Braoh. Minn., p. 464,, 



/ figs. 34, a-e. 



Gonvp&xe &\so Atrypa subtrigonalis. Hall 1847. Pal. IS. York, vol. L, p. 145, pi. 33, 



figs. 12, a-c. 



Several specimens of a shell which the writer is convinced is a rather 

 large local variety of Rhynchonella Anticostiensis, were collected at Lower 

 Fort Garry by the late Mr. Donald Gunn in 1858, by Dr. R. Bell in 1880, 

 and by Mr. Weston in 1884; also at the First Limestone Rapids, 100 miles 

 up the Nelson River, Keewatin, by Dr. R. Bell in, 1879. 



4^ 



