152 
Alloiodoris marmorata, Bergh... 
Plate viii., figs. 1 and 2. 
Alloiodoris marmorata, Bergh, Reis. im Arch, der Phil. 
VI., 1904, p. 42, PL iii., figs. 12-19. 
The identification of an unfigured species must always 
be a matter of some misgiving. None of the South Aus- 
tralian examples attain the size given by the author for Tas- 
manian specimens. In other respects the description har- 
monises so well with the animals before us that we have pre- 
ferred to use Dr. Bergh's name for them. We were unable 
to detect the denticules on the lateral teeth. The following 
account was prepared from living specimens : — 
Body elliptic, symmetrically rounded at both ends, 
moderately convex. Colour yellowish -white to greyish- 
brown, covered with minute spiculose elevations on the dor- 
sal surface, which impart to it the brownish tint ; also, wath 
less numerous, larger elevations, surrounded by irregular 
circles of deep brown. The latter occasionally have a centre 
of opaque white, surrounded bv a ring of reddish-brown, the 
whole giving the impression of miniature craters. Ventral 
surface translucent, white : irregularly sprinkled over with 
asymmetrical brown spots, either isolated or arranged in 
small groups. Mantle considerably broader than the foot, 
with a slightly undulating margin : fairly thin along the 
border, so that the colour-markings of the dorsal surface are 
visible from the under-side. Foot white, with few scattered 
spots of brown. Rhinophores and branchise brown, the lat- 
ter seven or eight in niimber. Larger individuals have come 
under our notice since this description. 
Dim. — Length 2 2 '5, breadth 10 mm. 
iy(2&.— Dredged in four fathoms. Port River, December, 
1901 (Field Naturalists) ; taken at low water on rocks, covered 
with seaweed, off Edithburg, Yorke's Peninsula, January, 
1903 (Basedow). 
Halgerda graphica, ^^pec. nov. 
Plate iii., figs. 1-4. 
Body squat, of elliptic form, symmetrically rounded at 
both ends, strongly convex. Colour opaque white, liver 
faintly visible through the mantle. Ornamented in the fol- 
lowing remarkable manner: — The surface of the mantle is 
divided somewhat regularly into quadrilateral figures, on 
either side of a distinct central line, by slightly elevated ridges 
of a rich orange-yellow colour ; within these divisions are simi- 
lar elevated curves and lines, in places semi-symmetrical with 
regard to a dark central spot, almost invariably present in 
the centre of each division, but easily detachable by slight 
