OCR Text |
Show 1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 249 DORIS TABULATA, sp. nov. (Plate XXVII. fig. 9.) Body very flat, oblong, rounded before and behind. Mantle widely expanded all round, the border subcrenulate and rather undulate at the extreme edge, covered above with very minute, close, granular tubercles, the surface being, nevertheless, smooth to the touch. Rhinophores small, close together, retractile into cavities which have the border slightly raised, denticulate and contractile. Branchiae 6, small, tripinnate, retractile within a cavity protected by six procumbent contractile lobes. Oral tentacles short and subcylindrical. Foot small, very narrow, grooved in front, with the uppet lamina notched. General colour (in spirit) light brown, with a dusky patch on the back and on the sole of the foot; above, on the mantle-expansion, are patches of brown, minute, epidermic, intergranular reticulations. Length (in spirit) 55 millims., breadth 35, height 7. Hab. ? The mantle-spicules are numerous and close, with blunt ends; some are straight, others more or less bent. DORIS HEPATICA, sp. nov. (Plate XXVIII. fig. 9, diam. §.) Body oval-oblong, rather depressed. Mantle expanded all round, thick and fleshy, with the border irregularly subcrenate and undulating ; smooth to the touch, covered above with minute, close, granular, soft, unequal, rounded tubercles. Rhinophores clavate, retractile into wide cavities, with the margins denticulate, although but little raised. Branchiae 6, tripinnate, rather short, retractile in a cavity with the edge raised and irregularly 6-lobed. Oral tentacles short, "flat, subconic in outline. Foot broadest in the middle, about one third the width of the mantle, rounded at both ends, anteriorly grooved, with the upper lamina expanded and widely notched in the centre. The general tint of the spirit specimen is a dark liver-colour. Length (in spirit) 90 millims., breadth 5-4. Hab. Pacific Ocean (Riciniola). The mantle is well furnished with spicules, which are irregularly cylindrical and with rounded ends; they are of different sizes, but none very large. DORIS MABILLA, sp. nov. [Bergh in schedi]. (Plate XXVIII. figs. 1-4.) Form depressed, elliptic ; mantle large, thick, fleshy, gradually thinning to a subcrenulate edge; raised upon the upper surface into laro-e, irregular, flattened pustules, which, in the larger specimens, become rugose upon the summit. Rhinophores with the upper half diagonally laminated, conical, and bent rather backwards, their pedicels' long and somewhat slender ; the cavities have the margins raised into subcrenate-edged sheaths. Branchiae 6, large, tripinnate, spreading, set round the tubular anus in a cavity which has the margin divided into 6 large procumbent lobes. Oral tentacles flat and rather leaf-like. Foot long and narrow, truncated and transversely |