EXPLANATION OF PLATE X. 

 Limnaea andersoniana, Nevill. 



Fig;, 1. — Living shell from pond near Yawnghwe. Length 12 mm. 

 Fig. 2. — Living shell from small stream at Fort Stedman. Length 9 

 mm. 



Limnaea sp. (prox. oralis, Gray). 

 Fig. 3. — Fossil shell from lake deposit on He-Ho plain. Length 9 mm. 



Limnaea bowelli, Preston. 

 YiG. 4. — Living shell (type-specimen) from Tibet. Length 8-5 mm. 



Limnaea shanensis, sp. nov. 



Fig. 5.— Fossil shell of phase A from lake deposit on He-Ho plain. 



Length 9 mm. 

 Fig. 6. — Subfossil shell of phase B from edge of He-Ho stream. 



Length 10 mm. 

 Fig, 7. — Living shell of phase C from the Inle Lake. Length 10-25 mm. 

 Fig. 8. — Fossil shell of phase D from bottom of Lile Lake. Length 6-5 



mm. 



Limnaea mimetica, sp. nov. 

 Figs. 9, da. — Type specimen (living shell). Length 6 mm. 



Succinea indica, Pfeiffer. 



Fig. 10. — Living shell from Inle Lake. Length 14 mm. 



Fig. 11. — Subfossil shell from edge of He-Ho stream. Length 14 mm. 



