PLATE X. 
Figs. F4a. PRODUCTUS MORROWENSIS n. sp .....p, 152 
1, la, lb, Ic. Pedicle, lateral, oblique, and cardinal views of the 
holotype, a pedicle valve. 2. An associated brachial valve, the 
allotype. Hale formation. Station 136. 
3, 3a. Interior and lateral views of a more complete brachial valve. 
Brentwood limestone, Station 210. 
4, 4a. Anterior and lateral views of another pedicle valve. Morrow 
formation. Station 298. 
Figs. 5-6. PRODUCTUS FAYETTEVILLENSIS n. sp p. 163 
5, 5a. Lateral and pedicle views of the holotype, a pedicle vaVe. 
Brentwood limestone. Station 134. 
6, A pedicle valve preserved as an internal cast. Kessler limestone, 
Station 209. 
Figs. 7-9. PUSTULA GLOBOSA n. sp p. 167 
7, 7a. Pedicle and lateral views of the holotype, a pedicle valve. 8. 
The allotype, a brachial valve. Brentwood limestone. Station 
210 . 
9. Another pedicle valve. Brentwood limestone. Station 148. 
Fig. 10. MEEKELLA STRIATOCOSTATA (Cox)' p. 148 
10. An incomplete pedicle valve, the only specimen. Kessler lime- 
stone, Station 144. 
Figs. 11-llc. RHYNCHOPORA MAGNICOSTA n. sp p. 176 
11, 11a, 11b, 11c. Pedicle, brachial, lateral, and anterior views of the 
holotype, a somewhat distorted individual. Brentwood lime- 
stone, Station 150. 
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