1. artata, Bens. 



2. Arula, id. 



3. aurea, Hind. 



4. bicanaliculata, Sow. 



5. bilinguis, Pfr. 



15. lubrica, Sow. 



16. pupiniformis, Sow. 



17. Cumingiana, Pfr. 



18. exigua, Sow. 



19. fusca, Gr«y. 



24. borubycina, P//\ 

 27. Blandfordi, Bens. 



199 

 Species. 



6. grandis, Pori. 



7. humilis, Paci?. 



8. imbricifera, Bens. 



9. Kevandreni, P^». 

 10. Mmdorensis, Ad. 



Subgenus Callia, Gray. 



11. Moubnsiana, -Fwc^. 



12. Strangei, P/?\ 



13. superba, ^c?. 



14. Thomsoni, Fori). 



Subgenus Pupinella, Gray. 



Subgenus Eegistoma, Hasselt. 



20. grandis, Gray. 23. sirailis, Sow. 



21. Nicobarica, Pfr. 



22. pellucida, Sow. 



Subgenus Phaphanlus, Pfeiffer. 



25. chrysalis, Pfr. 26. Lorraini, P/h 



Subgenus Streptaulus, Benson. 



Figure. 



Pupina (Registoma) grandis. PL 20. Pig. 109. Shell, showing the 

 funnel-shaped fissure in the lip. 



Genus 5. TRUNCATELLA, Risso. 



Animal ; Foot short, rounded at both ends ; head bilobed, more 

 or less muzzle-shaped ; tentacida short, triangular, diverging, 

 with the eyes placed centrally at their upper bases. 



Shell ; cylindrically turreted, decollated or obtusely truncated at 

 the apex ; tohorls rather narrow, sometimes smooth, sometimes 

 transversely finely-ribbed ; aperture ovate; lip simple, conti- 

 nuous. Operculum horny, simple. 



The little shells which constitute this genus are rather isolated from the 

 rest of the family. The animal has the faculty of looping itself like the 

 geometric caterpillar, so as to acquire a leap, and when found in numbers 

 on the sea-shore, which is its natural habitat, the sand appears alive in 



