13 
1895. Conulus fulvus Taylor, — Ottawa Nat., vol. 9, pp. 176, 177 (recorded 
from near Macleod and Little Bow river, Alberta). 
1899. Conulus fulvus alaskensis Pilsbry, — Nautilus, vol. 12, p. 116. 
1905. Euconulus trochif omits (pars) Dali, — Land and Freshwater Moll. 
Alaska, pp. 8, 40. 
1905. Eucotmlus trochif ormis var. alaskensis Dali, — id., p. 41. 
1906. Euconulus fulvus Yanatta, — Nautilus, vol. 20, p. 95 (recorded from 
Field, B.C., and Banff, Alberta). 
1910. Euconulus fulvus alaskensis Pilsbry and Ferriss, — Proc. Acad. Nat. 
Sci. Phila , 1910, p. 131, text f. 26 A-C. 
1919. Euconulus fulvus alaskensis Berry, — Proc. Acad. Nat. Sci. Phila., 
1919, pp. 196, 199, 202. 
1921. Petasina fulva Gude and Woodward, — Proc. Malac. Soc. Land., 
vol. 14, p. 177. 
Material Examined 
No. of 
Geol. Surv. 
spec. 
Locality 
Collector 
Date 
Cat. No. 
2 
Morley, Alberta 
J. Macoun..., 
1885 
ex-2932 
80 
Kananaskis, Alberta 
1885 
2928 
11 
Bow river, Alberta 
J. B. Tyrrell 
Sept. 28, 1883. 
2871 
4 
Waterton lake, Alberta 
U 
1883 
2870 
Some writers are beginning to show a tendency to call all P. fulva from 
the Rocky Mountain area and westward, P. /. alaskensis, and the writer 
being persistently unable (cf. Berry, 1920, p. 202) to distinguish definitely 
two nameable subspecies from the region in question must follow their 
lead. Specimens from several localities, chiefly Californian, kindly named 
by Mr. E. G. Yanatta, have been insufficient to elucidate the matter. 
There is the same need of critical overhauling of the North American 
snails of the fulva- group as exists in the case of Gonyodiscus cronkhitei. 
Vertigo modesta (Say 1824) 
1824. Pupa modesta Say, — Long’s 2d Exped., II, Appendix, p. 259, pi. 15, 
f. 5. 
1847. Pupa decora Gould, — Proc. Bost. Soc. Nat. Hist., vol. 2, p. 263, f. 
1869. Pupa ( Pupilla ) decora Binney and Bland, — Land and Freshwater 
Sh. N. Am., I, p. 237, f. 410. 
1885. Pupa ( Pupilla ) decora Binney, — Man. Am. Landsh., pp. 27, 59, 
189, 335, 483, f. 189. 
1893. Pupa hoppii Taylor, — Nautilus, vol. 7, pp. 85, 86 (recorded from 
Laggan, Alberta). 
1898. Pupa ( Nearctula ) decora Pilsbry,- — Nautilus, vol. 11, p. 119 (merely 
catalogued) . 
1898. Pupa (. Nearctula ) hoppii Pilsbry (pars), — Nautilus, vol. 11, p. 119 
(recorded from Laggan, Alberta). 
