258 MR. P. S. ABRAHAM ON THE [ Mar. 6, 
cles. (Rhinophores retracted and not visible in the specimen.) 
Branchize 10, small, slender, simple, strap-shaped, pointed, the 
inner edge serrate ; they surround the anal opening, and are com- 
pletely retractile into a cavity with a contractile orifice. Mouth in 
the centre of a triangular raised surface, the side angles of which are 
produced but not free ; on each side of the oral opening is a small 
indistinct tubercle. Foot not quite one third as broad as the mantle, 
truncated in front, with the margin thin and mesially notched, and 
rather produced laterally at the angles; it gradually narrows toa 
rounded point behind, and does not extend beyond the mantle- 
border. 
Colour of the spirit specimen transparent white, with the pustules 
and the margins of the mantle and foot opaque white ; the tubercles 
are yellowish; the branchiz yellowish, lineated with white. 
Length (in spirit) 12 millims., breadth 10, height 5. 
Hab. ? 
In a section of the mantle but one doubtful spicular-looking body 
was seen. 
Doris PECULIARIS, sp. nov. (Plate XXX. figs. 15-17.) 
Body oblong, rounded at both ends, convex, soft. The mantle 
reaches down over the head and foot all round, but with not much 
of the border free ; it is rather closely covered above with unequal, 
rotundate, soft, subrugose; flattish tubercles; and underneath it is 
marked with reticulating raised striee. Rhinophores oblong, slender, 
broadest at the apex, rather compressed from before backwards, 
rounded at the base and marked with minute laminations; they 
appear to arise from the anterior base of a large, sessile, whitish 
opaque body, which occupies the floor of the rimmed wide cavity 
into which the rhinophore is retractile ; they are placed well forward 
and rather close together. Branchiz 5, wide, deeply divided, and 
indistinctly tripinnate; they are set in a circle interrupted on the 
left side ; and between the two plumes which bound the hiatus is 
situated the soft tubular anus ; between the latter and the roots of 
the neighbouring branchiz extend ridges or lamin ; the whole 
system is retractile within a circular, rimmed cavity, situated far 
back. Mouth minute, in the middle of an indistinct, small, trian- 
gular, bilobed, raised surface, without tentacular appendages. Foot 
oblong, broad, nearly coextensive with the mantle, rounded in front 
and behind, the border flattened all round and notched in front. 
General colour of the spirit specimen purplish grey, with the 
tubercles of a darker and more reddish tint. 
Length (in spirit) 26 millims., breadth 13, height 9. 
Hab. South Australia (Port Lincoln). 
The mantle-spicules are short, mostly spindle-shaped and bent. 

Doris PRETENERA, Sp. nov. (Plate XXX. figs. 10-12.) 
Body elliptic, broad in the middle, more or less acuminated at the 
ends, rather convex, soft. Mantle smooth, fleshy, semigelatinous, the 
border fleshy and not much expanded. Rhinophores clavate, dia- 
