r,2 criNTRIBTJTIONS TO CANADIAN PAL.F.ONTOLOGT. 



a. M. Dawson, 18'74, H. M. North American Boundaiy Commission : 

 one well preserved but imperfect specimen. Old Wives Creek, Town- 

 ship 10, Eange 11, west of 3rd Principal Meridian, L'. G. McConnell, 

 1884 : two nearly perfect specimens, which in this instance correspond 

 better with Morton's figm-e of the type of his A. NicoUetii, than with 

 Meek's subsequent illustrations of the same species. 



SCAPHITES NODOSUS, OwCn. 



Sroplntcs (Amraonites f)nodosus,Ov;eji. 1852. Eep. Geol. Surv. Iowa, Wiscon. 



and Minn., p. .580, pi 8, fig. 4.— Meek & Hayden. 

 1S60. Proc. Ac Xat. Sr. Phil., vol. XII., p. -JL'O.— 

 :Meek. 187G. Pep. U.S. <:;eol. Surv. Terr., vol. IX. 

 pp. 42G-430, pi. 25, figs, la, b, c ; 2a, b, c ; and 

 fig. I : also pi. 2i), figs, la, b, c. 



South Branch of the Saskatchewan, Prof. H. Youle Hind, 18.58 : two 

 imperfect and not very large specimens. Elbow of the South Saskat- 

 chewan, Prof. .1. Macoim, 1879 : one fine specimen which measures 

 nearly five inches in its maximum diameter, South Saskatchewan, 

 mouth of Swift Current Creek, E. G. McConnell, 1882 : one specimen 

 nearly as large as that collected by Prof. Macoun. West end of the 

 Cypress Hills, Pi. G. McConnell, 188.3 : a medium sized example. 



SCAPHITES SUBGLOBOSTIS. (X. Sp.) 



Plate 7, fig. 3, and plate 8, all tlie figures. 



Shell strongly inflated, subglobose but narrowh' and deeply umbili- 

 cated in the centre, attaining to a large size, the largest example col- 

 lected, which is entirely septate, being nearl}' five inches in its maxi- 

 mum diameter, while the maximum breadth of its aperture, which is 

 identical with the greatest lateral convexity, is three inches and a half. 

 Volutions broadly rounded on the peripher}- and middle of the sider^, 

 but much more narrowly convex on their inner or umbilical sides, 

 increasing rapidly in breadth laterally, but not so rapidly in diameter 

 from the siphonal to the antisiphonal side, — closely involute and sij 

 deeply embracing that the whole of the inner ones are concealed, except 

 in the largest individuals, in which a considerable portion of the last 

 volution but one is exposed in the umbilical cavity : umbilicu> about 

 one-fourth of the entire diameter, with steep sides and an oblifjuely 

 rounded and ill-defined margin. Aperture transverse!)- reniform,, 

 nearly twice as broad as high and rather deeply emarginated by the 

 encroachment of the preceding volution. 



