19 



8. keraudrknii. (pi. iv. f. 2.) Vignard. 



T. parva, cylindrica, grisea, rufescente ; spira obtusa, recta, 

 apertura parva, margine incisura diviso ; labio externo leviter 

 incrassato, postice sub-plicato ; labio interno plicato. 



A pupiform species with a posterior canal. 



Manilla and Singapore. 



9. P. bicanaliculata. (pi. iv. f. 1.) nobis. Zool. Proc. 1842. 

 T. parva, ovali, alba, translucida, ; anfractibus ventricosis ; 



apertura magna, margine sub-expanso, sub-incrassato, ad basin 

 columella inciso ; labio interno postice plicato. 



This species differs from P. Keraudrenii in shape, being more 

 ventricose, having a tapering spire, and a very strong fold on the 

 inner lip. Found on small plants in the island of Zebu, Philip- 

 pines. 



EXPLANATION OF PLATE IV. 



PuPINjE. 



1. P. bicanaliculata. Sp. 9. 



2. — humilis. 7. 



3. — Keraudrenii. 8. 



4. — similis. 5. 



5. , var. 



6. — vitrea. 4, 



7. . var. 



8. — Nunezii. 1. 



9. , var. 



10. — » , var. 



1J. P. bicanaliculata. var. 



12. — lubrica. 3. 



13. , var. 



14. , var. 



15. , var. 



16. , var. 



17- — exigua. 6 



18. — pellucida. 2. 



19. , var. 



20. , var. 



