EXPLANATION OF PLATE XV. 



Photographs of shells of the Shan species of Taia : all natural size. 



Taia intha, sp. no v. 



YiQ, 1. — Shell from near the edge of the Central Region of the Lile 



Lake. 

 Fig. 2. — Shell with the spines abnormally developed, from the middle 



of the lake. 

 Fig. 3. — Type-specimen, from the middle of the lake. 



Taia elitoralis, sp. nov. 



YiQ, 4. — Unusually large and elongate male shell from the Intermediate 

 Zone of the Inle Lake. 



(Shell is covered by a colony of the Polyzoon Hislopia lacustris.) 



Fig. 5. — Type-specimen (female shell) of the same species. 



Taia analoga, sp. nov. 



Figs. 6, 7. — Type-specimens from peaty deposit on the He-Ho plain. 

 YiG. 12. — Young shell of the same species from the same deposit. 



Taia conica, sp. nov. 

 Fig-. 8. — Co-type from the Hsin-Dawng cave deposits. 



Taia cylindrica, sp. nov. 

 Fig. 9. — Type-specimen from the same deposit. 



Taia lacustris, sp. nov. 



Fig. 10. — Type-specimen from the lacustrine deposit on the He-Ho 



plain. 

 Fig. 11. — Young shell from superficial deposit on the same plain. 



Taia intermedia, sp. nov. 

 Fig. 13. — Type-specimen from superficial deposit on the He-Ho plain. 



Taia shanensis (Kobelt). 



Figs. 14, 15. — Male and female shells from Marginal Zone of the Inle 

 Lake. 



Taia naticoides (Theobald). 



Figs. 16, 17. — Shells of the Yawnghwe phase. 



Taia theobaldi (Kobelt). 

 Fig. 18. — Subfossil shell from the soil at Kalaw. 



Taia obesa, sp. nov. 

 Fig. 19. — Type-specimen from cave deposit at Hsin-Dawng. 



