43 
Productus cora d’Orbigny 
1842. Productus cora d’Orbigny, Yoy. dans l’Am^r. m6rid., t. Ill, pt. 4, 
p. 55, PI. 5, figs. 8-10; Productus prattenianus Meek, 1872, U.S. 
Geol. Surv., Nebraska, p. 163, PI. 2, figs. 5a-c, PI. 5, fig. 13, PL 8, 
figs. 10a, b; Productus cora White, 1884, 13th Rept. Geol. Surv., 
Indiana, p. 126, PL 26, figs. 1-3; Keyes, 1894, Missouri Geol. Surv., 
vol. 5, p. 47, PL 37, figs. 2a-c; Beede, 1900, Univ. Geol. Surv., 
Kansas, vol. 6, p. 75, PL 11, figs. 1-1 f; Girty, 1903, U.S. Geol. 
Surv., Prof. Paper 16, p. 364, PL 4, figs. 1-4 b. 
Remarks. Our form agrees closely with the Pennsylvanian shell 
usually identified with this South American species. The presence of a 
few large spines upon the body of the shell is a variable feature. 
Locality and Horizon. Widely distributed throughout North America 
in the Pennsylvanian. In the Minnewanka region in the Pennsylvanian 
of section 1-22 (?), 27 (c), 29 (c), 31 (r); 2 a-3 (r), 10 tf), 14 (r); 2-8 (?), 
11 (R), 13 (c); 3-7 (c); 3 a-4 (c). 
Genus, Pustula Thomas 
Pustula punctata (Martin) 
1809. Anomites punctatus Martin, Petrefacta Derbiensia, p. 8, Pl. 37, 
fig. 6; Productus punctatus Morton, 1836, Am. Jour. Sci., 1st series, 
vol. 29, p. 153, Pl. 26, fig. 38; Meek, 1872, U.S. Geol. Surv., Neb- 
raska, p. 169, Pl. 2, fig. 6, Pl. 4, fig. 5; Meek and Worthen, 1873, 
Geol. Surv., Illinois, vol. 5, p. 569, Pl. 25, fig. 13; White, 1877, 
U.S. Geog. Surv. west of 100th Mer., vol. 4, p. 114, PL 7, figs. 
2 a-c; White, 1882, 11th Rept. Geol. Surv., Indiana, p. 373, Pl. 42, 
figs. 1-3; White, 1884, 13th Rept. Geol. Surv., Indiana, p. 124, 
PL 27, figs. 1-3; Hall and Clarke, 1892, Pal. N.Y., vol. 8, pt. 1, 
Pl. 17 A, fig. 21, Pl. 19, figs. 14-16; Keyes, 1894, Missouri Geol. 
Surv., vol. 5, p. 51, Pl. 37, figs. 1 a-c; Beede, 1900, Univ. Geol. 
Surv., Kansas, vol. 6, p. 87, Pl. 10, figs. 3-3 e, Pl. 11, fig. 3. 
Remarks . The Minnewanka form is quite similar to the typical Coal 
Measures shell of the Mississippi valley. P. alternatus Norwood and Pratten 
of the Osage group has broader concentric bands, broader umbonal region, 
and relatively longer hinge-line. P. biseriatus Hall from the St. Louis group 
has no sinus on the pedicle valve and very few (five or six) concentric folds. 
Locality and Horizon. Pennsylvanian throughout North America. 
In the Minnewanka region in the Pennsylvanian of sections 1-29 (r); 
2-2 (c), 10 (R). 
Pustula nebrascensis (Owen) 
1852. Productus nebrascensis Owen, Geol. Rep. Wis., Iowa, Minn., p. 594, 
tab. 5, fig. 3; Meek, 1872, U.S. Geol. Surv., Nebraska, p. 165, 
Pl. 2, fig. 2, Pl. 4, fig. 6, Pl. 5, figs. 11 a-c; Meek and Worthen, 
1873, Geol. Surv., Illinois, vol. 5, p. 569, Pl. 25, fig. 8; White, 1877, 
U.S. Geog. Surv. W. 100th Mer., vol. 4, p. 116, Pl. 8, figs. 3 a-d; 
White, 1884, 13th Rept. Geol. Surv., Indiana, p. 122, PL 24, figs. 
7-9; P. nebrascensis ? Heilprin, 1886, 2d Geol. Surv., Pennsylvania, 
