1877.| ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 251 
the border crenulate. Rhinophores elongate-conical, upon a con- 
tracted base, with minute numerous lamine extending far down, 
retractile into deep cavities, which have the openings raised into 
denticulated sheaths. Branchiz 7, bipinnate, spreading ; along the 
internal face of each plume lie a central midrib and two lateral lon- 
gitudinal bordering veins; between these extend delicate upright 
laminze, which, towards the free end of the plume, become developed 
into branches. The anus is short, with the aperture somewhat fim- 
briate and dentate. The branchial cavity has the border raised and 
indistinctly lobulate. Oral tentacles short, subconical, and rather 
grooved above. Foot narrow, widest across the middle, with an 
anterior transverse groove, the upper lamina of which is deeply 
notched, a little enlarged, and bearing one or two terminal papillee at 
each side of the notch. The foot becomes acuminated, small, and 
free behind. 
Colour of the spirit specimen light brownish, closely and irregularly 
blotched with reddish brown on the back, and with darker unequal 
spots upon the mantle-expansion. Branchie and rhinophores light 
brown. Underneath, the general tint is yellowish brown, with an 
orange tinge upon the foot, and with a few large unequal round or 
oval black spots upon the sides of the body and upon the neigh- 
bouring portion of the mantle; some smaller spots are upon the sides 
of the foot. 
Length (in spirit) 45 millims., breadth 32, height 10. 
Hab. Amboina. 
The mantle-spicules are numerous, slender, elongated, cylindrical, 
and interlacing. 
Doris sTRAGULATA, sp. nov. (Plate XXVIII. figs. 7, 8.) 
Body oval, convex on the back. Mantle very large, soft, thick, 
and fleshy, especially on the expanded border, the edge of which is 
irregularly crenate: it is thickly covered above with small, unequal, 
rounded tubercles; beneath, it is smooth. The rhinophores are 
short and clavate, with rounded and somewhat mucronate tips: 
their cavities have the margins produced into wide tuberculated 
fleshy sheaths. Branchiz 6, short, tripinnate, closely embracing 
the short tubular anus, and retractile into a deep cavity with a 6- 
lobed margin. Oral tentacles flat, linear, and poimted. Foot com- 
paratively small, oblong, rounded at both ends; anteriorly with a 
deep transverse slit, having the upper lamina expanded, mesially 
divided by a large triangular notch, and more or less lobulated. 
The outline of the lower lamina is rather crenulate. 
General colour (in spirit) a mottled grey, lighter upon the mantle- 
expansion, the darker tint being formed by a minute dotting between 
the tubercles. The rhinophores are grey, with whitish tips; the 
branchiee greenish mottled grey. On the under surface a broad 
mottled brown band is situated all round between the foot and the 
mantle-margin. The latter is yellowish, and the wavy line of demarca- 
tion is tolerably distinct. The oral tentacles are yellowish, and the 
foot brown and blotchy except on the edge. 
