PLATE 40. 
Fig. 1. 238. 1. CaRriNaRopsis CARINATA. ( Pag. 183.) 
1 a, b. Lateral and dorsal views. 1c. Lateral view of another specimen, showing a more elevated carina. 
Fig. 2. 239. 2. CarINARoPSsIS PATELLIFORMIS. (Pag. 183.) 
2 a. Dorsal view. 2b. Lateral view of the same specimen. 
Fig. 3. 240. 1. BELLEROPHON BILOBATUS. (Pag. 184.) 
3 a. Dorsal view, showing the sinus of the aperture. 
3b. Lateral view, showing the involution of the whorls. 
3 c, d. Two views of a smaller specimen. 
Fig. 4, 5. 241. 2. BELLEROPHON BILOBATUS, va7. ACUTUS. (Pag. 185.) 
4 a,b. Dorsal and lateral views of the specimen. 5 a, b. Another variety, apparently due to pressure. 
Fig. 6. 242, 3. BELLEROPHON BILOBATUS, va7. CORRUGATUS. (Pag. 185.) 
6 a. A specimen which is in a stone with three others, only one of which shows a slight development of the 
dorsal folds. 6 b. A specimen less distinctly corrugated. 
Fig. 7. | 243. 3. Bucania EXPaNnsa. (Pag. 186.) 
7 a. View of the back of the shell, showing the strong carina, expanded aperture, and sinus on the dorsal 
margin. 76. Lateral view of the same. 
7c. Transverse section of the last volution, below the aperture. 
7d, e. Lateral and front view of another specimen, from which the expanded portion of the aperture is broken 
off, and showing also a little deviation in form. 
Fig. 8. 244, 4. BucaNia BIDORSATA. (Pag. 186.) 
8 a. Dorsal view of a small specimen, preserving a portion of the shell. 
8 6. View of the aperture, which is very imperfect. 
8c. A fragment, showing the carine and dorsal band very distinctly. 8 d. The same enlarged. 
8 €. Cast of a larger specimen, imperfect towards the aperture, and showing only the broad dorsal carina. 
8 f. Lateral view of the same, showing the umbilicus. 
8 g. Section of the last volution below the aperture. 
