1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 263 
retractile, situated around the anus, far back and low down. Ora 
veil short, very wavy, the sides prolonged, free, and flattened. Foot 
broad, truncated in front, with a very indistinct transverse groove ; 
it is rounded behind ; and the margin all round is very wavy. 
Colour of the spirit specimens transparent white, with a blue 
coloration on the back and sides; some of the lower tubercles have 
a reddish or brownish tinge at the base; the rhinophores are faint 
purplish, becoming lighter at the apex ; the branchiz are variegated 
with grey. Underneath, the margin of the mantle is marked with 
fine, close, radiating, reddish-brown-purplish lines; the foot and 
oral veil are yellowish white. 
Length 17 millims., breadth 13, height 12. 
Hab. New Zealand. 
The spicules of the mantle-border are rather numerous and long, 
tolerably slender and spindle-shaped; they seem to be arranged 
radially ; in other parts they are smaller and inore crooked, and are 
agglomerated in small scattered bundles. 
The buccal apparatus is very small; the buccal collar seems to be 
very rudimentary, if present at all. The odontophore is narrow, 
and bears 19 transverse rows, each containing but 2 large spines, 
and on each side from 4 to about 7 rudimentary conical ones. The 
base of the large spine appears to be membranous at one part 
below ; it is laterally flattened and subquadrangular. 
DoRIDOPsIS AUSTRALIENSIS, sp. noy. (Plate XXX. figs. 25, 26.) 
Body oblong-elliptic, smooth, soft, and subdepressed ; mantle 
with the margin subcrenulate, rather wavy, and not much extended ; 
Rhinophores small, clavate, pointed, transversely laminated above, 
and retractile within sbeathless cavities. Branchiz 6, slender, bipin- 
nate, sometimes divided, situated far back, with the protrudent anus 
between the two hindermost plumes, in a simple-edged mantle-cavity. 
The suctorial mouth is retractile through an opening in the front 
border of the foot ; and in front of it are two minute triangular lobes. 
Foot elliptic-oblong, rounded at both ends; anteriorly there is a 
slight transverse groove, the upper lamina divided by the mouth- 
opening. 
Colour of the spirit specimens semitransparent bluish grey, almost 
white towards the border and underneath, darker on the dorsal 
region; the rhinophores are smoky, with white tips; the branchiz 
rey. 
; Tenth (in spirit) 18 millims., breadth 10. 
Hab. New South Wales. 
This may be a young form of the animal called Actinodoris 
australis by Mr. Angas (loc. cit.), whose figure, however, repre- 
sents but 5 branchiz, and a uniform olive-black colour ; the descrip- 
tion is too meagre for any accurate determination. 
DorIpopsis OBSCURA, sp. nov. (Plate XXX. figs. 29, 30.) 
Body oblong, rounded at the ends, rather convex; mantle soft, 
slightly rugose, the boder subcrenulate and but little extended. 
