PLATE XCIV. d13 
EoortTHIs INDIANOLA (Walcott) (p. 780). 
[Pl. XCIV, figs. 1t-u.] 
Figure 2. Exterior of a ventral valve, the type specimen, enlarged to show surface coste and strie. U.S. Nat. 
Mus. Cat. No. 52343b. 
2a. Exfoliated ventral valve showing cast of visceral area. Locality 12p, Upper Cambrian limestones at the 
northwest extremity of the Arbuckle Mountains, about 4 miles (6.4 km.) east of Homer, Carter County, 
Oklahoma. U.S. Nat. Mus. Cat. No. 52342a. 
2b, 2b’; 2c, 2d, and 2e. Exterior of four ventral valves that vary in form and surface characters. U.S. Nat. 
Mus. Cat. No. 52343c-f, respectively. 
2f and 2i’. Exterior and side outline of dorsal valve. U.S. Nat. Mus. Cat. No. 52343¢. 
2g and 2g’. Ventral valve associated with the specimen represented by figure 2a. U.S. Nat. Mus. Cat. No. 
52342b. 
2h. Exterior of dorsal valve. U.S. Nat. Mus. Cat. No. 52343h. 
With the exception of figures 2a and 2g the specimens represented are all from Locality 12k, Upper Cambrian 
limestones in sec. 35, T. 1 S8., R. 1 E., Ardmore quadrangle, Carter County, Oklahoma. 
EoorTHIS HASTINGSENSIS (Walcott) (p. 779). 
Ficures 3 and 3’. Exterior view and side outline of ventral valve from Locality 21, Middle Cambrian limestone at 
the base of the Paradoxides zone on Hanford Brook, St. John County, New Brunswick. U.S. Nat. 
Mus. Cat. No. 52337a. This is the type specimen. 
3a. Diagrammatic outline of a vertical median section through the united valves of a specimen associated 
with the ventral valve represented by figure 3. U.S. Nat. Mus. Cat. No. 52337b. 
3b and 3c, 3c’. View of exterior of ventral and dorsal valves, with side outline of dorsal valve, from Locality 
2s, Middle Cambrian limestone, at Hastings Cove, on Kennebecasis Bay, northeast of St. John, New 
Brunswick. U.S. Nat. Mus. Cat. Nos. 52336a and 52336b, respectively. 
