OCR Text |
Show 250 MR. P. S. ABRAHAM ON THE [Mar. 6, slit in front, with the upper lamina enlarged and divided in the middle; rounded behind, and not reaching to the mantle-edge. Colour (of the spirit specimens) mottled greyish brown aooye, with the pustules generally much lighter, except on their summits ; beneath, the colour is a light grey, shading into brownish towards the margin ; a broad irregular band of chocolate-colour, often more or less composed of large confluent blotches, extends all round, except quite posteriorly, on the mantle-expansion, not quite|halfway between the foot and the edge. The foot is chocolate-brown, with a lighter band round the border. The large specimens are generally darker. Length (of an average spirit specimen) 95 millims., breadth 62, breadth of foot 22. Hab. Seychelles ; Samoa. The mantle-spicules are long and very slender : they are occasionally subnodular towards the ends, which are but little acuminated. The mouth opens into a large fleshy pharynx, upon each side of which is a rather small chitinous plate, and which becomes inwards rather cartilaginous and longitudinally plicated. The odontophore is broad, with about 26 transverse rows of numerous lateral spines, which are short, hook-shaped, the base of each being elongated, laterally flattened, and slightly knobbed at the anterior angle. DORIS SUBTUMIDA, sp. nov. (Plate XXVII. figs. 10, 11.) Body elliptic, inflated on the back. Mantle large and expanded all round, the border wavy and subcrenulate at the edge, covered above with minute granules. Rhinophores clavate, short, the upper two thirds laminated, the apex somewhat truncated and mucronate ; retractile within large cavities, of which the margins are prolonged and lobulate. Branchiae 6, rather short, tripinnate, set round the short tubular anus, which is just in front of the division between the two hindermost plumes ; the general branchial cavity is deep, with the wall produced and lobulate. Oral tentacles long, linear, and grooved above. Foot broadest in the middle, rounded in front and behind, with an anterior transverse groove and notched upper lamina. Colour of the spirit specimen light brown, covered above (very thickly on the sides) with dark brown epidermic intergranular clouding. The rhinophores and ramifications of the branchiae are purplish brown. Below, the tint is yellowish, with an orange tinge on the foot, and with scattered unequal purplish-brown spots and freckles all over the pallial expansion, except at the extreme border. Length (in spirit) 55 millims., breadth 38, height 14. Hab. Mediterranean Sea. The spicules are slender, moderate in size, numerous, and close. DORIS SPECIOSA, sp. nov. (Plate XXVIII. figs 10, 11.) Body elliptic. Mantle widely expanded all round, leathery, granular above, from the presence of numerous close minute tubercles |