15 
Material Examined 
No. of 
spec. 
Locality 
Collector 
Date 
Geol. Surv. 
Cat. No. 
21 
Entrance to Rocky mts., Kananaskis, Alta. 
Kananaskis, Alberta 
J. Macoun, 
1885 
2914 
16 
U 
1885 
2916 
? 4 
Swamp on Tobacco plains, Kootenay River 
J. B. Tyrrell. . 
1883 
2868 
The present determination of these specimens has kindly been confirmed 
by Dr. G. Dallas Hanna of the California Academy of Sciences, who writes 
(in lift., November 2, 1920), “I consider your identifications correct in 
every case. The specimens have been compared with material from Eng- 
land, Norway, Maine, Alaska, and Pleistocene fossils from Kansas and 
Iowa. Those from the Tobacco plains locality approach the Alaska forms, 
which I consider a new species, but they are not quite mature and there- 
fore not entirely comparable. The Alaska specimens are heavier and more 
obese, as shown by the following measurements 
Species 
Locality 
Length 
in mm. 
Diameter 
in mm. 
C. edentula 
England 
1-96 
M2 
(7. alticfila 
Kananaskis, Alberta 
2-48 
1-42 
it 
Tobacco plains, B.C.... 
2-38 
1-45 
C., sp 
Unalaska 
2-84 
160 
All the present specimens have been recorded by Whiteaves (1905, 
p. 171) as Sphyradium edentulum (Draparnaud). 
Punctum pygmteum (Draparnaud 1801) 
1801. Helix pygmcea Draparnaud, — Tabl. Moll., p. 93 (teste Taylor). 
1805. Helix pygmcea Draparnaud, — Hist. Moll., p. 114, pi. 8, f. 8-10 
(teste Dali). 
1841. Helix minutissima Lea, — Proc. Am. Philos. Soc., vol. 2, p. 82. 
1844. Helix minutissima Lea, — Trans. Am. Philos. Soc., vol. 9, p. 17. 
1864. Punctum minutissimum Morse, — Jour. Portl. Soc. Nat. Hist., vol. 1, 
p. 27, text f. 69-70, pi. 8, f. 71. 
1885. Microphysa pygmcea Binney, — Man. Am. Landsh., pp. 57, 71, 482, f. 
31-33. 
1898. Punctum pygmceum Pilsbry, — Nautilus, vol. 11, p. 142 (merely 
catalogued) . 
1905. Punctum pygmceum Dali, — Land and Freshwater Moll. Alaska, 
pp. 9, 53. 
1909. Punctum pygmceum Taylor, — Mon. Land and Freshwater Moll. 
Brit. Isles, p. 157, f. 215-219 (European form). 
1909. Punctum pygmceum minutissimum Taylor, — id., p. 161, f. 220-223 
(American form). 
