54 CONTRIBUTIONS TO CANADIAN PALAEONTOLOGY. 



and Belly Eiver, west of St. Maiy Eiver, G. M. Dawson, 1881 : two 

 fragments ; also, St. Mary Eiver, west of MacLeod Benton trail, E. G. 

 MeConnell, 1881, three good examples, averaging about six inches in 

 diameter. Lake south of Milk Eiver, (a large fragment) and South 

 Saskatchewan, opposite Swift Current Creek, (a large and perfect 

 specimen fifteen inches in diameter) E. G. McConnell, 1882. Eed 

 Deer Eiver, above cros.sing of Lord Lome trail, E. G. McConnell, 1882, 

 (one large fragment) and J. B. Tyrrell, 1884, a similar but smaller 

 specimen. 



PlACENTICERAS PLACENTA, var. INTERCALARB. 



■/ Ammonites syrtalif:, jMorton. 1834. Synops. Org. Kern. Cret. Gr. V. S., p- 40, 



pi. K; (14 bj' mLstake), tig. 4. 

 Ammonih's placenta, var. intercalaris, Meek & Hayden. 18(10. Proc. Ac. Nat. Sc, 



Phil., vol. XII., p. 117. 

 ? Ammonites Tamvlicus, Blanford. M. S. S. 1862. Mem. Geol. Surv. India, vol. 



VI., p. 118. 

 ? Aininonites Giutdaloupie, Stoliczka. 18(35. Palfeont. Indica, vol. I., p. 90, pi. 47,. 



figs. 1 and 2, and pi. 48, fig. 1. Not A. Gw:i- 



ddloupx, Etcmer. 

 Placentieeras placenli I , var. interccdare, Meek. 1876. Eep- U. S. Geol. Surv. Terr.,. 



vol. IX., p. 468, pi. 23, figs, la, b, c 



St. Mary's Eiver, near its mouth, G. M. Dawson, 1881 : a nearly 

 perfect and exquisitely preserved specimen, about five inches and a 

 half in diameter, with the test jjreserved. In this specimen the double 

 row of small nodes or tubercles which forms the outer boundary of 

 the periphery and the single row which encircles the umbilicus on 

 both sides of the shell are moderately well developed, but the row on 

 the outer half of each of the sides is almost obsolete. Bei-ry Creek, 

 Township 25, Eange 12, west of 4th Principal Meridian, J. B. Tyiu-ell, 

 1884 : one imperfect specimen, in which all the rows of nodes and 

 tubercles are fiiliy developed. 



