PLATE 37. 
Fig. 1. 218. 
1 . 
Holopea 
SYMMETRICA. 
(Pag. 170.) 
Fig. 2. 219. 
2. 
Holopea 
OBLIQUA. 
(Pag. 170.) 
2 a. View of the aperture of a 
small 
specimen. 
2 b. View of the back of the shell. 
2 e. Profile view. 
2 d. Back of a larger specimen. 
Fig. 3. 220. 3. 
Holopea paludiniformis. 
(Pag. 171.) 
3 a. View of the back of the shell. 
3 b. View of the aperture. 
Fig. 4. 221. 4. 
Holopea ventricosa. 
(Pag. 171.) 
4 a. View of the back of the spire. 
4 b. View of the top of the spire. 
Fig. 5. 222. 10. 
Pleurotomaria subtilistriata. 
(Pag. 172.) 
5 a. View of the spire of a large specimen. 5 b. Profile of the same. 
5 c, d. View of the spire and profile of the largest specimen seen. 
Fig. 6. 223. 11. Pleurotomaria lenticularis. (Pag- 172.) 
6 a. View of the spire (the specimen is a cast). 6 b. Lateral view, showing the elevation of the spire. 
6 c. Base of a smaller specimen (a cast), showing the umbilicus. 6 d. Front view, showing the aperture. 
Fig. 7. 224. 12. Pleurotomaria rotuloides. (Pag- 173.) 
7 a. View of the aperture and front of the shell, showing the elevation of the spire. 
7 b. View of the top of the spire. 7 c. View of the base, showing the umbilicus. 
Fig. 8. 
225. 13. Pleurotomaria subconica. 
(Pag. 174.) 
8 a. Front view of a specimen preserving the shell in a very perfect manner ; the aperture imperfect. 
8 b■ Base of the same, showing the small partially closed umbilicus. 
8 c. An enlarged portion of the surface, showing the cancellated strise which are scarcely visible to the naked 
eye. 
8 d. Cast of another specimen. 8 e. Front view of the same, showing the form of the aperture. 
