EXPI.ANATION OF PIvATE IX. 



Photographs of L. jenkinsianus, and its subspecies. 



Laiuellidens jenkinsianus, subsp. obcsa (Hanley and Theobald). 



Fig. I. — Adult shell from Tonghoo, Burma. 

 ,, 2. — Adult shell from vSylhet Bhils, Assam. 



Lamellidens jenkinsianus (Benson). 



Fig. 3. — Adult shell from Upper Brahmaputra, Assam. 

 ,, 4. — Adult shell from Dacca, Eastern Bengal. 



Lamellidens jenkiiisianus, subsp. daccaeiisis (Preston). 



Fig. 5. — Young shell from Dacca, Eastern Bengal; type of 

 Parreyssia daccaensis, Preston. 

 „ 6. — Young shell from Bhagalpur, Bengal. 

 ,, 7. — Adult shell from Sylhet Bhils, Assam. 

 ,, 8.— Adult shell of an elongate type from Dacca district, 

 Eastern Bengal. 



