9 
Locality 
Size 
Shell 
Whorls 
Umbilicus 
Sculpture 
1 Cincinnati, Ohio 
Similar to 
Maine shells 
Somewhat 
higher 
More like 
western shells 
Similar to 
Maine shells 
Similar to 
Maine shells 
2 Kananaskis, Alta.. . 
it 
(( 
More rounded, 
less carinate, 
and angled 
at middle 
instead of 
almost on 
shoulder,but 
less so than 
in No. 6 
Narrower 
Finer and 
closer, but 
fairly regu- 
lar 
3 Waterton lake, Alta. 
tc 
it 
More rounded, 
less carinate, 
and angled 
at middle 
instead of 
almost on 
shoulder 
it 
Weaker and 
less regular, 
but not . so 
much as in 
No. 6 
4 Sta. XIV, Glacier 
National park, 
Mont. 
A little larger 
Higher 
it 
Almost as in 
Maine shells 
5 Winnecook, Mont.. . . 
Much larger. . 
Somewhat 
higher 
U 
if 
Weaker and 
less regular 
6 Susanville, Cal 
A little larger 
Higher 
it 
ti 
it 
7 Bluff Lake, San Ber- 
nardino mts., Cal. 
Much larger... 
Somewhat 
higher 
it 
If G. cronkhitei cronkhitei is a valid western subspecies, it appears, 
on the average, to be larger than anthonyi, and more elevated, to have more 
rounded, and less carinate whorls, the aperture rounded and slightly 
angled near the middle, the sculpture less sharp and heavy and more ir- 
regular, the umbilicus averaging narrower, the colour often very dark, and 
the surface usually more lustrous. 
Watson 1 has recently advanced evidence which would seem practically 
conclusive in effecting the immediate removal of Pyramidula (as typified 
by the European species rupestris Draparnaud) from the melange of forms 
with which it generally has been associated, to a position in systematic 
proximity to Vallonia , Acanthinula, and the Pupillidce. As not one of the 
numerous American species which have commonly been referred here falls 
under typical Pyramidula as thus newly defined, it is necessary 
to align them with another group or else to elevate one or more of the sub- 
genera containing them to full generic rank. The adoption of the latter 
alternative in the present instance results in the rehabilitation of Gonyo - 
discus Fitzinger, 1833. 
1 Proc. Malac., Soc. London, vol. 14, p. 6 and ff. 
