EXPLANATIONS OF PLATE 15 (6). 



SuBULiTEs VENTRicosA. page 346 (42). 



Fig. L View of a rather larger individual of this species, somewhat restored in the 

 upper part. 



LoxONEMA LEDA. page 346 (42). 



LoxoNEMA sp. .page 346 (42). 



Fig. 2. Figure from a gutta-percha cast taken in the natural mould ; faint remains of 

 indistinct transverse strije are visible. 



EuNEMA ? TRiLiNEATA. page 346 (42). 



Fig. 3. The figure is taken from a gutta-percha cast of the natural mould in the rock. 

 Cylonema ? ELEVATA. page 342 (38). 



Fig. 4. View of a cast of this species. 



Trochonema (Pleurotomaria) pauper, page 343 (39). 

 Fig. 5. View of the aperture, taken from a gutta-percha cast made in the natural mould. 

 " 6. Basal view of the same specimen as fig 5, showing the umbilicus. 

 " 9. A small internal cast of this species. 



Trochonema (Eunema) fatua. page 345 (41). 



Fig. 7. View of an internal cast of this species. 

 " 8. The figure is from a gutta-percha cast, and shows the longitudinal striae very 

 perfectly. 



Pleurotomaria HOYi. page 364. 



Fig. 10. View of a cast of this species. 



Pleurotomaria occidens. pages 343 and 364 (39), 



Fig. 11. Lateral view of a specimen of this species, which preserves a portion of the 

 surface. 

 " 12. View of the spire taken from a gutta-percha cast in the natural mould. 



Pleurotomaria halei. pages 344 and 364 (40). 



Fig. 13. View of the spire of a cast of this species. 

 " 14. The elevation of the spire. 



Pleutomaria idia. page 365. 



Figs. 15, 16. Vertical and lateral views of a cast of this species. 



Pleurotomaria axton. page 344 (40). 



Fig. 17. View of a specimen of this species taken from a gutta-percna cast. Iit*^ «*> 



HoLOPEA GUELPHENSis. page 343 (39). 



Fig. 18. View of a cast which has been referred to this species. 



MuRCHisoNiA coNRADi. page 344 (40). 



Fig. 19. View of a specimen of this species, taken from a gutta-percha cast. 



MuRCHisoNiA LAPHAMi. page 366. 



Fig. 20. The figure is from an impression taken in the natural mould, and shows the 

 characters of the surlace and form of the aperture. 



Straparollus mopsus. page 342 (38). 



Figs. 21, 22. Upper and lower sides of a specimen of this species. 



Tremanotus alpheus. page 347 (43). 



Fig. 23. Lateral view of the specimen, showing the umbilicus. 

 " 24. Dorsal view, showing the filling of the dorsal perforations, and the radiating 

 strias near the aperture. 



