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Show 1867.] MR. G. F. ANGAS ON N E W AUSTRALIAN MOLLUSCA. 91 1 MODIOLARIA BARBATA, n. s. (Pl. XLIV. fig. 12.) Shell small, oblong-ovate, more or less convex, whitish, covered with a yellowish-green horny epidermis, which becomes long, thick, and fibrous posteriorly ; the valves very finely concentrically irregularly striated, and decussated with elevated radiating ribs, which are obsolete near the middle. Long. 5, alt. 2, lat. l£ lines. Hab. Botany Bay, N e w South Wales. OSTREA VIRESCENS, n. s. (Pl. XLIV. fig. 13.) Shell solid, orbicular, inequivalve, with the margins of the valves crenulately frilled. Superior valve smaller, flattened, radiately plicate, and laminately scaled, whitish, irregularly striped with purplish brown; inferior valve larger, the cavity deep; interior greenish olive, paler at the margins; cardinal area large, triangular, and flattened. Long. If, lat. 1^ inch. Hab. Attached to rocks and madrepores at low spring tides at Watson's Bay, Port Jackson. CROSSEA CONCINNA, n. s. (Pl. XLIV. fig. 14.) Shell narrowly umbilicate, turbinate, rather solid, white, semipel-lucid; spire raised, suture distinct; whorls five, rounded, the first three transversely ribbed and longitudinally striated, the remainder transversely punctate-striate ; umbilicus bordered by a rounded callus ; aperture circular, with a channelled angular projection in front; outer lip simple, the margin acute. Diam. 2 lines, height 1\. Hab. "Sow and Pigs" reef, Port Jackson, from 2 to 4 fathoms. This species has much the form of C. bellula, A. Ad., but differs in size, being considerably larger, and in the sculpture of the whorls; the angular projection of the aperture also is not so strongly developed. The only two species of the genus hitherto known were obtained by Mr. Arthur Adams from the Gotto Islands in Japan. DESCRIPTION OF PLATE XLIV. Fig. 1. Alicia angustata, p. 908. 2. elegantula, p. 908. 3. Thracia modesta, p. 908. 4. Bosinia puella, p. 909. 5. Sunetta adelina, p. 909. 6. Spisula cretacea, v. 909. 7. producta, p. 909. Fig. 8. Loripes assimilis, p. 910. 9. Felania adamsi, p. 910. 10. jacksoniensis, p. 910. 11. Lepton adamsi, p. 910. 12. Modiolaria barbata, p. 911. 13. Ostrea virescens, p. 911. 14. Crossea concinna, p. 911. |
