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 avove, with 
the pustules generally much lighter, except on their summits ; be- 
neath, 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 quitezhalfway 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 occasion- 
ally 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 nume- 
rous 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. Branchiz 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 branchiz 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, gra- 
nular above, from the presence of numerous close minute tubercles ; 
