Plate VII 
Paraphorhynchu3 obscurum n. sp. 
Figure 1. View of internal mould of pedicle valve, showing the strength of the teeth, the 
ridges bounding the muscle valve, and the median septum. Section 1, locality 14. (Page 46.) 
Figures 2, 3. View of internal mould of brachial valve and side view of internal mould of 
combined valves. Section 1, locality 14. (Page 46.) 
Spirifer rockymontanus Mareou 
Figures 4 a, b. Lateral and ventral views of a pedicle valve of the average size. Section 2, 
locality 12. (Page 54.) 
Figures 5, 6. Views of pedicle valves. Figure 6 is a large internal mould. Section 2, locality 12. 
(Page 54.) 
Figures 7 a, b, c. Cardinal, ventral, and lateral views of a pedicle valve. Section 2, locality 12. 
(Page 54.) 
Figures 8 , 9, 10. Views of brachial valves. Section 2, locality 12. (Page 54.) 
Deltopecten occidentalis latifonnia n. var. 
Figures 11 a, b. Views of the external and internal moulds of the type specimen. Section 1, 
locality 14. (Page 76.) 
Figure 12. View of internal mould formed with both valves in place and closed. The pos- 
terior portion is imperfect. Section 1, locality 14. (Page 76.) 
Euphemus carbonariua arenarius n. var. 
Figure 13. View of the type specimen. The outer whorl is lacking medially. Section 1, 
locality 10. (Page 79.) 
