PLATE XXI. 



Euomphalus decewi. 

 Fig. 1, 2. Profile and upper surface view of a specimen. Page 181 



Euomphalus sampsoni. 



Fig. 3, 4. Profile and lateral view of a specimen. Page 182 



Platyostoma turbinata. 



Fig. 6, 6. Dorsal and vertical view of a specimen. Page 184 



Platyostoma lineata. 



Fig. 7, 8. Vertical and dorsal view of a specimen. Page 183 



Pleurotomaria procteri. 



Fig. 9, 10. Dorsal and vertical view of a specimen. Page 173 



Fig. 13. Dorsal view of a small specimen. 



Pleurotomaria sulcomarginata. 



Fig. 11, 12. Vertical and dorsal view of a specimen. Page 174 



