192 



or Birch Island, by T. 0. Weston in 1884 ; at Dog Head by L. M. Lambe 

 in 1890 ; and at Commissioners (or Cranberry) Island, by D. B Dowling 

 in 1890. 



LiosPiRA PERSiMiLis, Ulrich and Scofield. 



iiospira 2'«™'''»^*s, Ulrich and Scofield 1897. Geol. Minn., Final Rep., vol. III., 



pt. 2, p. 998, pi. 82, figs. 39-41. 



Reindeer Island, Lake Winnipeg, D. B. Dowling, 1890: one specimen, 

 from a loose piece of limestone. 



LiospiRA ANGUSTATA, Ulrich and Scofield. 



Liospira angustata, Ulrich and Scofield 1897. Geol. Minn., Final Rep., vol. III., pt. 



2, p. 997, pi. 68, figs. 35-37, and pi. 69, figs. 

 1 and 2. 



Inmost or Birch Island, Lake Winnipeg, D. B. Dowling and L. M. 

 Lambe, 1890 : one specimen of the variety with obtuse periphery. 



HORMOTOMA GRACILIS (?) Hall. (Sp.) 



Murchisonia gracilis, Hall 1847. Pal. N. York, vol. I., p. 181, pi. 39, 



• figs. 4, a-c. 



,, M Salter 1859. Geol. Surv. Canada, Can. Org. Rem., 



Dec. I., p. 22, pi. 5, fig. 1. 



„ „ Billings 1863. Geol. Canada, p. 183, fig. 178. 



Nicholson 1875. Rep. Pal. Prov. Ont., p. 18, fig. 7, c. 



fibrmotomia gfrcwJHs, Ulrich and Scofield .... 1897. Geol. Minn., Final Rep., vol. III., 



pt. 2, p. 1014, pi. 70, figs. 18-36. 



Snake Island, Lake Winnipeg, D. B. Dowling and L. M. Lambe, 

 1890 : four casts of the interior of shells which are doubtfully referred 

 to this species. A similar cast of the interior of a shell which is possibly 

 also, referable to this species had previously been collected sixty miles up 

 the Nelson River, Keewatin, by Dr. B. Bell in 1878. 



HoRMOTOMA WiNNIPEGENSIS. (N. Sp.) 

 Plate 21, fig. 1. 



Shell elongated, more than twice as long as broad, very large and 

 attaining to a length of fully eight inches : spire, as viewed dorsally, 

 much higher or longer than the last volution : apical angle of one of the 

 largest and least compressed specimens in the Survey collection, 36°. 



Volutions about nine, the later ones much broader than high, the 

 breadth of the last but one being nearly or quite twice its height, 

 moderately convex, but somewhat compressed at their midheight ; suture 

 distinct but not deeply impressed. 



