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Show 1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 253 Colour (in spirit) white, with an opaque greyish marbling on upper surface. Length (in spirit) 36 millims., breadth 20, height 10. Hab. Mauritius. The mantle-spicules are small, slightly bent, with the surface a little nodular or rough. Odontophore broad, with numerous short hook-shaped spines, the bases of which are laterally flattened. DORIS GRANULOSA, sp. nov. (Plate XXIX. figs. 1-3.) Body oblong-elliptic, not very depressed. Mantle ample, presenting a granular appearance from a close covering of small, sessile, unequal, rounded tubercles. Rhinophores minutely laminated, rather slender, subconical or pyriform (in one specimen the apices are slightly enlarged and rounded) ; their cavities are wide, and have the margins produced into short tuberculated and denticulated sheaths. Branchiae 8,rather short, slender and spreading, bipinnate, surrounding the short tubular anus in a circle interrupted behind ; the two hinder-most plumes are deeply divided; the margin of their common cavity is nearly smooth. Oral tentacles small, free, flat, and linear. Foot oblong, truncated and transversely grooved in front, with the upper lamina deeply notched, the lower slightly so; the posterior extremity is rounded, and the border flattened. Length (inspirit) 17 millims., breadth 11. The colour of the preserved specimens is a dirty yellowish. Hab. New Zealand. The mantle-spicules are small, very short, and spindle-shaped. Odontophore broad, with numerous lateral spines, which are comparatively large and recurved at an angle. DORIS LONGULA, sp. nov. (Plate XXIX. figs. 4, 5.) Body oblong, rounded at both ends. Mantle ample, covered with a minute, subequal granulation. Rhinophores short, broad, and apparently conical ; their cavities with the apertures simple, and not produced. Branchiae 12, small, slender, bipinnate, in a complete circle round the tubular anus ; retractile in a wide cavity with minutely and irregularly denticulated margin. Oral tentacles small and linear. Foot oblong, rounded at the ends, transversely grooved in front, with both laminae notched; it reaches behind to the edge of the mantle ; and its border is free and flattened. Length (in spirit) 18 millims., breadth 7. Colour (in spirit) a dirty cream. Hab. New Zealand. DORIS CUCULLATA, sp. nov. (Plate XXIX. figs. 11, 12.) Body oblong, raised. Mantle widely expanded, somewhat like a hood, over the head ; elsewhere with the border but little developed, and not extending down to the foot laterally or posteriorly; it is closely covered with small, subequal, conical tubercles. Rhinophores (their form not determinable in the specimen) retractile within large |