156 Memoirs of the Indian Museum,. [Vol. VII, 



Museum it is found all along the coasts of peninsular India from Kachh on the western 

 side to Balasore in the east, and also along the coast of Arakan and the Malay 

 Peninsula. One specimen is labelled as coming from as far east as Amboina. 



In a fossil condition, it is known from the pliocene of the Mekran coast and 

 from the post-tertiary formations of the Pulicat lake. 



The discussion of the relationship of this shell to other species will be deferred 

 until the completion of the description of Dolium tessellatum. 



Dolium (Eudolium) tessellatum, Bruguière. 

 (Plate VI, fig. 7; pi. VII, figs. 8-10; pi. VIII, figs. 11-13. 



1789. Buccinum tessellatum, Bruguière. Encyclopédie méthodique, Vol. VI, sp. 4, pp. 236, 



246, pi. 403, figs. 3a, b. 



1790. Dolium tessellatum, Bruguière, Encyclopédie méthodique, pi. 403, figs, lia, b, 

 1823. Dolium fimbriatum, Suwerby, Genera of Shells, tig. 2. 



1830. Dolium costatum, Menke, Synopsis methodica, 2nd ed., p.. 63. 

 1831-1837. Dolium fasciatum. Brug. var. sec. Kiener, Iconographie des Coq. viv. Dolium, pi. iv, 



fig. 6. 

 1831-1837. Dolium variegatum, Lam. (junior) sec. Kiener, Icon, des Cog. viv., pi. ii, fig. 3. 

 1845. Dolium costatum, Deshayes, An. sans vert., 2nd ed., Vol. X, p. 144. 

 1845. Dolium minjac, Adanson sec. Deshayes, An. sans vert., 2nd ed., Vol. X, p. 145, 



no. 9. 

 1845. Dolium ampullaceum. Philippi, Zeit. Mal., p. 147. 



1849. Dolium fimbriatum, Sow., Reeve, Monograph of the genus Dolium, sp. 3 * 



1849. Dolium costatum, Desh., Reeve, Monograph of the genus Dolium, sp. 8. 

 1849. Dolium ampullaceum, Phil., Abbild. Ill, 4. Dolium, p. 12, pi. ii. 

 1857. Dolium costatum, Mke., Küster, Conch. Cab. von Martini und Chemnitz, Vol. Ill, 



1st section, 2nd part, p. 61, pi. lvi, fig. 3 ; pi. lvii, fig. 3. 

 1857. Dolium Lischkeanum, Küster, Conch. Cab., p. 71, pi. lxii, fig 1. 

 1857. Dolium fimbriatum, Sow., Küster, Conch. Cab., p. 72, pi lxii, fig. 2. 

 1879. Dolium costatum, Desh., Martin, Die Tertiärschichten auf Java, p. 40, pi. vii, 



figs. 9, 10. 

 1899. Dolium costatum, Desh., Martin, Samml. des geol. Reichsmus. in Leiden, new series, 



Vol. I. p. 161, pi. xxv, figs. 371-373. 



Medium to large, globose, slightly ovoid, with slightly conoidal, sometimes 

 conical depressed spire measuring from two-ninths to three-tenths of the total 

 height. 



The protoconch is relatively small, the diameter of the visible portion not ex- 

 ceeding three millimetres. It consists of a horny transparent substance of dark- 

 brown colour. The internal secondary infilling of porcellaneous shell-substance does 

 not reach the apex, so that the minute, depressed, coiled nucleus, lacking internal 

 support, is almost always broken off. The visible portion of the protoconch is rather 

 prominent, semi-naticoid, that is with the appearance of a half-embedded Natica and 

 includes three convex whorls separated by very narrow, slightly grooved sutures. 

 The protoconch is slightly oblique to the axis of the remainder of the shell. The 

 line of junction of the protoconch with the remainder of the shell is slightly cur vi- 



