EXPLANATION OF PLATE VIII. 



Fig. ii, a, b. — Dolium tessellation, Brug. Immature specimen. Andamans. 



Natural size. 

 ,, 12, a, b. — Dolium tessellatum, Brug. Immature specimen of uncertain origin, 



with fully developed outer lip. Natural size. 

 ,, 13, a, b, c. — Dolium tessellatum, Brug. Specimen of uncertain origin, with 



exceptionally depressed spire. Natural size. 



