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Show 1878.] FROM THE ANDAMAN ISLANDS. 819 nulous lirae, with a furrow on each side, whereof the lower is the more conspicuous. Immediately below this the colour of the interrupted scarlet stripes changes to black, and they assume the form of somewhat quadrate spots, but towards the aperture become more flame-like and merge into scarlet. 66. HALIOTIS VARIA, Linne. H. varia, Linn., teste Reeve, Conch. Icon. iii. sp. 4. * Hab. Philippines. 67. ATYS CYLINDRICA, Helbling; Sowerby, Thesaurus, ii. pl. 125. f. 114. Var. = Bulla solida, Brug. Ency. Meth. pl. 360. f. 2 ; Thesaurus, pl. 124. figs. 112, 113. Var. = Atys elongata, A. Ad.; Sowerby, Thesaurus, ii. pl. 125. fig. 121. Hab. Philippines, Ceylon. 68. CARDIUM HYSTRIX, Reeve, Conch. Icon. ii. figs. 40 a, 6. Hab. Philippines (Cuming). The Andaman specimen of this lovely shell belongs to Reeve's var. Q, being pure white, with the exception of a pale tint of pink on the posterior side near the ligament. 69. CARDIUM (LEVICARDIUM) AUSTRALE, Sowerby, Proc. Zool. Soc. 1840, p. 105 ; Conch. Illust. figs. 12, 12* (overcoloured); Reeve, Conch. Icon. ii. fig. 97. C. pulchrum, Reeve, Conch. Icon. fig. 98. Hab. Philippines, China, Ceylon. The differences of form, sculpture, and colouring which Reeve considered sufficient to distinguish his C.pulchrum from C. australe are, in my opinion, hardly sufficient to constitute a variety. The form in almost every species of Cardium is subject to considerable variation, and likewise the colour. Reeve does not mention that the anterior dorsal area in his type is blotched with purple at the extremity, as is the case in C. australe. The sculpture of both forms is identical: both have the groove on the posterior side, which, within the valves, forms a raised oblique ridge ; but in some specimens it is more conspicuous than in others. The Andaman examples are rather young and bear the remains of their epidermis, which takes the form of very thin, short, irregular yellowish lamellae arising from the radiating striae. Their colour is whitish or yellow, marked with subconcentric irregular yellowish brown bands, which are more purple-brown within the valves and towards the umbones. The latter at the tips and the hinge-margin are purple ; and within, a line of the same colour extends from the umbo to about the middle of the valves. 70. CORBULA FORTISULCATA. (Plate L. figs. 23-236.) Shell very inequivalve, inequilateral, somewhat triangular, dirt/ white, solid, rounded at the posterior extremity and beaked anteriorly, *. |
