174 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



eept where tbey are covered by small portions of the inner layer of 

 the test. 



This species appears to belong to the same group of Ammonites as 

 the *.l. Ckon and ^4. nisus]- of d'Orbigny and the Placenticeras 

 Pore:iaiiam of the Queen Charlotte Islands, and the remarks on pages 

 157 and 158 of this I'ej^ort, on the generic position of the shell last 

 named, ai'e equally' applicable to P. (jlnhrum. 



(4.) From the Fort Pierre Group of the Later Cretaceous Eooks 



OF the Saskatchewan and its Tributaries; collected 



BY J. B. Tyrrell in 1885 and ISSe.J 



LAMELLTBRANOHIATA. 

 Pteria linguiformis, var. subgibbosa, Meek. 



Avicfula mhgibhom, Meek and Haydeu. ISnO- Proc. Ac. Nat. Sc. Phil., p. 180. 

 Pteria nthgibhosu, Meelc 18(_i4. Sniitlison. C'lieck-List N. Am. Cret. Foss. 

 Pkria linguiformis, var, Ruligibbosa, Meek. 1S7G. Kep. U. S. Geol. Surv. Terr., vol. 

 IX., p. 33, pi. 28, i3g. 12. 



Battle Eivor, Township 46, Eange 4, west of the 4th Principal 

 Meridian, 1885. 



InocerajMus Sagensis, var. Nebrascensis, Owen. 



Inoceramus Sagenf.ii), Owen. 1852. Cieol. Rep. Wise, Iowa & Minn., p. 582, pi. 



7, fig. 3. 

 Inoceramus Ncbrascensis, Owen. 1852. lb., p. 582, pi. S, fig. 1. 

 Inoceramus Sagensis, var. Nehrascensis, Meek. 1876. Eep. U. S. Geol. Surv. Terr., 



vol. IX., p. 52, pi. 13, figs. 2 a, b. 

 Inoceranim: Sar/ensis, Wljitfield. Pal. P.lack Hills Dakota, p. 393, pi. 7, tig. 12, and 



pi. 8, fig. 2. 



Mouth of Vermilion Eiver, Township 54, Eange 3, west of the 

 4th Principal Meridian; Korlli Saskatchewan Eiver, Township 54, 

 Eange 2, west of the 4th Principal Meridian ; Nose Creek, Section 

 24, Township 44, Eange 2, west of the 4th Principal Meridian, 188(i : 

 one sjjecimen fr(jm each of these localities. 



* For the synonymy of this species see Pictet ami Campiche, PtiL Suisse, t 1, p. 109. 

 t Pal. Franc., Terr. Cret., 1. 1, p 184, pi. .55, figs. 7-9. 



I Pages 174 to 184 are reprinted, witli some additions, from an Appendix to Mr. Tyrrell's 

 Keport in the Annual Report of the Survey for 1880, Vol. 2, New Scries, p[). ]r).j-103 E. 



