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Show 1879.] MR. G. F. ANGAS ON NEW SHELLS. 419 blue spotted with brown ; interior of the valves faintly stained purple and orange ; margins crenate. Long. 9, lat. 9, alt. 4 lin. Hab. Unknown. Coll. Hanley. 6. PECTUNCULUS CARDIIFORMIS, n. sp. (Plate XXXV. figs. 6, 6 a.) Shell solid, subovate, ventricose, subequilateral, equivalve, white, variously mottled with brown and purple, the markings here and there being small, close together, and of a zigzag character, especially towards the umbones, whilst nearer the centre and towards the base they form several irregular concentric zones or bands, the dorsal area being crossed by similar but more regular bands of a darker colour, whilst a few small triangular white spots occur amongst the brown markings; valves ornamented with between forty and fifty small prominent rounded ribs, the interstices between which, as well as the ribs themselves, are crossed by very fine close-set raised striae that become somewhat scabrous towards the sides and base ; cardinal area small and deep ; umbones prominent, incurved anteriorly ; interior white stained with purple in front; margins strongly dentate. Long. 17, alt. 18, lat. 11 lin. Hab. Unknown. Coll. Hanley. There is a second specimen in the late Mr. Taylor's collection which is larger, and of a lighter colour, with fewer purple markings ; whilst the angular white spots are larger and more numerous. Long. 21, alt. 20, lat. 13| lin. Coll. T. L. Taylor. Externally this fine shell has very much the aspect of a Cardium. 7. PECTUNCULUS AUREOMACULATUS, n. sp. (Plate XXXV. fig. 7.) Shell solid, roundly ovate, moderately convex, equilateral, equivalve ; white, variously clouded with bright orange patches and spots, and with two or three short flames of the same colour upon the dorsal area; valves with about twenty-five prominent, flattened, nodulous radiating ribs, both the ribs and the interstices between them being crossed by close-set, fine, raised, thread-like striae ; cardinal area very small; umbones moderate; interior of valves white, stained with purple. Long. 11, alt. 1 2, lat. 6 lin. Hab. Eastern seas 1 (Belcher). Coll. Hanley. 8. PECTUNCULUS TAYLORI, n. sp. (Plate XXXV. fig. 8.) Shell solid, orbicular, moderately convex, very slightly compressed and subangulate anteriorly ; greyish white, tinged with pale fulvous in the centre, and irregularly spotted all over with dark purple short descending flames, smaller and more numerous at the upper part; valves with numerous flattened radiating ribs that become obsolete towards the sides, and sculptured all over with very fine longitudinal close-set grooved lines ; umbones central, moderate; cardinal area 27* |