PLATE 7. 



Page 



Fig. 1. Anchura haydeni 311 



a. Lateral view ; the posterior process of the wing and the heak 

 restored from casts left in the matrix ; natural size. 



Fig. 2. Anchura (Drepanocheilus) prolabiata 312 



a. Lateral view ; natural size. 



Fig. 3. Anchura (Drepanocheilus) mudgeana 312 



a. Lateral view, showing exterior surface of wing. 

 zb. Apertural view of another example. Natural size. 



Fig. 4. Anchura (Drepanocheilus) ruida 312 



a. Apertural view ; natural size. 



b. Opposite view of the same. 



Fig. 5. Turritella marnochi 314 



a. Lateral view, showing natural surface ; natural size. 



b. Another example ; a natural cast ; the test removed. 



Fig. 6. Neritina incompta 308 



a. Lateral view ; natural size. 



b. Apertural view of the same example. 



c. Apical view of the same. 



Fig. 7. Neritina (Velatella) patelliformis 309 



a. Dorsal view ; natural size. 



b. View of the under side of the same. 



c. Lateral view of the same. 



d. Posterior view of the same. 



Fig. 8. N. (V.) patelleformis var. weberensis — 309 



a. Dorsal view ; natural size. 



b. Lateral view of the same. 



Fig. 9. Action woosteri 304 



a. Lateral view of natural cast ; natural size. 



b. Apertural view of the same. 



c. Gutta-percha cast of a natural mould of the exterior surface, 



showing stria;. Enlarged. 



Fig. 10. ACTJEONINA PROSOCHEILA 305 



a. Lateral view ; natural size. 



b. Apertural view of the same. 



Fig. 11. Neritina pisum 308 



a. Apical view ; natural size. 



b. Lateral view of the same. 



c. Under view of the same. 



Fig. 12. Physa carletoni 306 



a. Lateral view ; natural size. 



Fig. 13. Physa ? 307 



a. Lateral view of a sandstone cast ; natural size. 



Fig. 14. Placunopsis hilliardensis 278 



a. Exterior view of the upper valve ; natural 6ize. 



