EXPLANATION OF PLATE IV. 



Fig. i, a, b, c. — Dolium maculatum, Desh. Andamans ; specimen with fully 



formed aperture. Natural size. 

 ,, 2, a, b. — Dolium macidatum, Desh. Immature specimen ; Andamans. 



Natural size. 

 ,, 3, a, b, c. — Dolium maculatum, Desh. Large specimen showing adult 



character of ornamentation ; Andamans ; a, b, natural size ; 



c, protoconch enlarged. 



