1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 259 
gonally laminated, and truncated at the apex, retractile, with soft 
protuberant sheaths situated very far forward and near together. 
Branchie 5, short, tripiunate, the two hinder plumes sometimes 
double ; between the latter is situated the short, broad, tubular anus; 
the margin of the general cavity is a little raised and smooth. Oral 
tentacles flattish, grooved above, variable in size, in one specimen 
rather long and linear. Foot oblong, subtruncate, and without a 
groove in front, rounded and but little free behind. 
Colour of the spirit specimens semitransparent creamy white ; 
the rhinophores smoky, with whitish tips; the branchial pinnule 
blackish. 
Length (in spirit) 38 millims., breadth 23, height 13. 
Hab. New South Wales. 
The mantle seems to be almost devoid of spicules ; in one section 
one or two uncertain elongated bodies were seen. 
The mouth opens vertically into a soft conical buccal chamber, 
which has the wall longitudinally plicated ; projecting into the base 
of this is a large cartilaginous nodular protuberance with an open- 
ing in the middle. This probably serves as a kind of prehensile 
buccal collar ; but it is not spiculose. The odontophore is of the 
typical Doris type, broad, the sides bent up and applied together, 
with about 16 transverse rows of numerous spines. The latter are 
well developed, long, pointed, and recurved, laterally compressed, 
with broad bases; none are central in position ; but the lateral rows 
nearly meet in the middle line. 
Doris WELLINGTONENSIS, sp. nov. (Plate XXIX. figs. 27, 28.) 
Body oval, convex, swollen. Mantle thick, fleshy, not extended 
or flattened at the border; covered with large, rounded, flat pustules, 
between which are scattered small, opaque, whitish tubercular spots. 
Rhinophores small, clavate, compressed from before backwards, each 
with more than 26 small laminz, lying between shallow longitudinal 
depressions, and extending low down; the apices are styliform, and 
marked with laminz, except at the extreme rounded tip; they are 
retractile through large, wide, fleshy sheaths. Branchiz 7, ramose, 
tripinnate, moderate in size, surrounding the tubular anus, which is 
placed near, and opposite to, the interval between the last two 
plumes ; the whole system is retractile within a large deep cavity, 
the margin of which is crenulate and wavy, and can be contracted 
completely over them. Oral tentacles short, thick, tubercular, trun- 
cated, and apparently with a central pit on the apex. Foot oblong, 
broad, fleshy, flatly rounded, and without an anterior groove ; pos- 
teriorly it is obtusely acuminated. 
Colour of the spirit specimen dirty white. 
Length (in spirits) 42 millims., breadth 30, height 21. 
Hab. New Zealand (Wellington). 
The mantle-spicules seem to be absent. 
Doris? DELICATA, sp. nov. (Plate XXX. figs. 20-22.) 
Body elliptic-oblong, truncated in front, obtusely and roundly 
les 
