EXPLANATION OF PLATE II. 



Vivipara bengalensis eburnea, subsp. nov. 



Fig. I. — Shell from type-series from Kotagiri reservoir, Nellore 

 Dist., ^ladras Presidency. 

 Actual height 32"5 ram. 



2. — Shell of dark phase from a poiid in Godavari (town), 

 Madras Presidency. 

 Actual height 29 mm. 



Vivipara bengalensis phase incrassata, nov. 



Fig. 3. — Type -specimen from Thungabada, Kurnool Dist., Madras 

 Presidency. 

 Actual height 22"5 mm. 



,, 4. — Shell of the elongate tj-pe from the same series. 

 Actual height 30 mm. 



Vivipara bengalensis phase annandalei , Kobelt. 



Fig. 5. — Shell from type-series from Vizagapatam . N E Madras 

 Presidency. 

 Actual height 26'5 mm. 



,, 6. — Shell from muddy pool, Secunderabad, Hyderabad. 

 Actual height 28 mm. 



,, 7. — Shell from a dirty pond near the same place. 

 Actual height 24 mm. 



,, 8.- — Shell of the elongate type from a dirty pond at Bellia- 

 ghata, Calcutta. 

 Actual height 22'5 mm. 



Vivipara bengalensis phase halophila, Kobelt. 



FiGs. 9, 10. — Shells from Calcutta (history unknown). 



Actual heights 24 mm. (fig. 9) and 26 mm. (fig. 10). 



(The reticulate pattern seen on fig. 10 is due to 

 remains of the polyzoon Hislopia lacustris.) 



