158 
white. We do not note the projecting sheaths of these ten- 
tacles, that are apparently represented in Angas's sketch. 
Branchial plumes, four, tripinnate : colour, light orange or 
white. 
Hah. — Marino, taken from under the rocks, at low water, 
March, 1902 (Basedow). 
Nembrotha (?) verconis, spec. nov. 
Plate ii., figs. 1-3. 
Body large, linear, oblong, swollen in centre, and taper- 
ing behind. Colour, rich lemon-yellow, with large discon- 
nected blunt tubercles of deep prussian blue arranged very 
indistinctly parallel to the edge of the foot. The skin is very 
delicate, and peels off easily on abrasion ; it is noticeably 
wrinkled, the pits of the folds thus produced appearing of a 
deeper shade than the rest. Cloak almost entirely wanting. 
Frontal margin (veil) small, of deep prussian blue colour, 
composed of three semi-circular dilations, the two lateral of 
which arch laterally around the dorsal tentacles on either 
side, then gradually fading to nil posterior to them. Foot 
square in front, dilated outwardly at the anterior end, sides 
slightly frilled, approximately parallel, passing posteriorly to 
a bluntish point, colour light sea-blue, with a deep blue border ; 
liver visible as a faint brown patch in the centre. Dorsal 
tentacles sub-clavate, tapering, laminated : about 30 slightly 
oblique laminae, non-retractile ; colour deep prussian blue, 
with a yellow stalk. Eyes not visible. Genital aperture pro- 
minent, situated one-fourth the whole length from the fron- 
tal margin ; of a lighter (greenish) blue colour than the 
tubercles. Branchial plumes five, tripinnate, almost com- 
pletely surrounding the anus ; colour dark yellow at the base, 
passing into a rich blue along the stems and delicately fringed 
with small purple tufts. 
Radula. Marginal plates four, subquadrate, curved over 
in front, the most remote very small or wanting ; lateral spines 
one, large, hooked, bifidated ; possessing a peculiar spiral 
twist. Central plate subquadrate-ovate. Colour light straw 
to amber yellow. About 18 rows. Formula, 4 -f- I'l'l -f- 4. 
Dim,. — Length 55, breadth 12 mm. 
Hab. — Dredged in 20 fathoms, off Newland Head, Back- 
stairs Passage, January, 1903 (Verco). 
0&«. — The indications of the existence of a cloak are al- 
most entirely wanting, beyond the slight continuation of the 
frontal margin past the dorsal tentacles and the somewhat 
linear arrangement of the tubercles. This species seems 
clearly separated from co-generic forms by its vivid prim- 
rose colour. A large specimen is in the Australian Museum 
