EXPLANATION OF PLATE III. 



Fig. 4, a, b. — Dolium fasciatum (Brug.). Varicose specimen from Hong-Kong. 



Natural size. 

 ,, 5, a, b, c. — Dolium fasciatum (Brug.). Varicose specimen from Vizaga- 



patam. Natural size. 

 „ 6. — Dolium zonatum, Green. Hong-Kong. Natural size. 



