PLEUROBRANCHUS. 205 
paler than above. Shell on the anterior half of the body, concealed, 
small, fragile, pellucid, oblong ovate, convex and ornamented with 
wrinkles of growth. Nucleus posterior, more or less brownish. 
(Pse.). 
Sandwich Is. (Pse.) 
P. varians Psez., P. Z.S., 1860, p. 25, No. 20. 
(Australo-Zealandie Species.) 
P. PUNCTATUS Quoy & Gaimard. PI. 45, figs. 2, 3, 4, 5, 6. 
Body elongated ordinarily flat above, rounded at the two ends, 
wider behind. Mantle covering the foot to the edges, but the foot 
projects behind. Entire body smooth, of a beautiful orange, with 
two lateral series of white dots above; tentacles and produced angles 
of veil have a deeper orange longitudinal line; foot with a groove 
of lighter tint in front. The viscera are visible through the integu- 
ment both above and below, as a brown spot. Veil wide, arcuate, 
terminating in two obtuse points ; tentacles proportionally very long. 
Length 1 to 2 inches. The figures represent it in various positions. 
Port Jervis, Australia, 9-10 fms. 
Pleurobranchus punctatus Quoy & GAIMARD, Zool. Astrolabe, ii, 
p- 299, pl. 22, f. 15-19 (1832). 
P. aneast Smith. Pl. 46, figs. 12, 13. 
Animal (in spirit) uniformly pale buff, elongate ovate. Mantle 
probably smooth in life, wrinkled by contraction, not very widely 
produced at the free margin. Foot broad, tapering behind, roundly 
subtruncate in front, where there is a thickening forming a double 
margin beneath the proboscis. The frontal veil is straight in front, 
angular at the sides, which are grooved. Tentacles shortish, slit at 
the outer side, with the minute eye-specks at their base behind. 
Branchial plume consisting of about sixteen leaflets. Penis spine- 
like, very acute, and slightly curved at the tip. 
Shell placed well forward, the pale apex being posterior. It is 
brown in front, glossy, and beautifully iridescent on the exterior. 
It consists of about a whorl and a half, the nucleus being spiral and 
hollow within. The last whorl is much prolonged by additional 
strongly defined concentric layers, and also ornamented with fine, 
yet distinct transverse strive. The columella is arcuate, and has an 
umbilical groove parallel with it. 
Length of animal 17 mill., diam. 7; length of shell, from nucleus 
to opposite end, 43. (Smith). 
Port Jackson (Coppinger). 
