14 CONTEIBUTIOXS TO CANADIAN PAL.EONTOLOGT. 



Physa Copei, White. 



Plate 2, figs. 4 and 4a. 



Pliijm Copei, AVliite. 1S77. Bui. V.S. Geol. Surv. Terr., vol. III., p. C02. 



18S0. V. S. Geol. Surv- Terr., C'ontr. to Pal., Nos. 2-8, p. 85, 

 pi. 24, figs. 4a and b. 

 " " 1SS3. Eev. Xon-Marine Foss. Moll., X. Am., pp. 43, 44, pL 



25, figs. 1 and 2. 



Bow Eiver, eight miles west of Blackfoot Crossing ; G-ooseberry Carion,. 

 St. Mary Eiver, and St. Mai-y Eiver, three miles north of the 49th 

 Parallel, G-. M. Dawson, 1S81. Pincher Creelv, crossing of Mill Creek 

 and Fort MacLeod Trail, G. M. Dawson and E. G. McConnell, 1881, and 

 T. C. Weston, 18S3. All from the St. Mary E. series. 



High Eiver, one mile below the Forks, E. G. McConnell, 1882. 



Month of Blind Man Eiver, .J. B. Tyrrell, 1884; from the same geo- 

 logical horizon and from the same beds as Limium tenuicostata. 



A t'eyr specimens of a large Physa were collected at the above- 

 mentioned localities, which seem to correspond very well with Dr. 

 White's descriptions and tigures of P. Copei, especially in the character 

 "spire short, less than one-third the entire length,'' and in the fact that 

 the '• diameter of the body A'Olution is almost efjual to one half the entire 

 length of the shell. The number of volutirnis in P. Copei is indeed. 

 stated to be about four, but Dr. White's figures show that the apex as 

 well as tke outer lip of the tj'pe of that sijecies are very imperfect. 

 In unbroken Canadian specimens of the shell now under consideration 

 the number of volutions is six or ^even,but the three apical whorls are 

 exceedingly slender and fi-agile, and conse(|nently may have been 

 broken olt' in Dr. White'> specimens, as thej^ nuj^t frequentlj* are in 

 those from the Bow and Belly Eiver district. Seven of the most per- 

 fect specimens from Pincher Creek and one example from tjooseberry 

 Caiion were sent to Dr. White for examination, who reports upon them, 

 as follows, in a letter to the writer : " These all seem to belong to 

 P Cojiei. I think that if they had reached the size of m\ type speci- 

 mens the la^t whorl would have been proportionately larger than your 

 specimens present." 



Physa Copei, var. Canadensis. (Var. Nov.) 

 Plate 2, ligs. .5, .5 b and 5 a. 



Shell large, attaining to a length of fully two inches, nai'rowly sub- 

 ovate or ovately subfusiform in outline : length rather more than twice 



