92 TETHYS—POLYNESIAN. 
outer lip anteriorly obliquely produced ; dorsal and inferior mar- 
gins very obliquely sloped forwards. (Sowb.). 
Sandwich Is. (Pse.). 
Syphonota bipes Puass, P. Z.S., 1860, p. 23.—A plysia bipes Sows. 
Conch. Icon., xvii, pl. 6, f. 26a, b. 
This species contracts itself when handled so as to form a ball. 
The young are subpellucid. The hinder part of the foot is evidently 
used as a sucker, by which the animal suspends itself. (Pse.). 
T. SANDVICHENSIS Sowerby. PI. 20, figs. 46, 47. 
Shell obliquely oblong, arched, ivory, brown towards the edges, 
white within, apex elevated, very little incurved ; upper margin 
sloped downwards, deeply excavated, angular at the end; outer lip 
roundly produced below; dorsal margin convex, inclined towards 
the outer lip below, widely excavated. (Sowd.). 
Shores of Sandwich Islands (Cuming). 
Aplysia sandvichensis Sows., Conch. Icon., xvii, pl. 4, f. 14a, b 
(August, 1869). 
“Much more arched than Aplysia tigrina.” But it may be only 
the shell of a fully adult 7. bipes Pease. 
T. GRANDIS Pease. PI. 20, figs. 40, 41. 
Body long, smooth, elevately rounded above and rather compressed 
along the sides. Mantle lobes thin, rounded, much dilated and 
strongly undulated along the margins. Dorsal tentacles rather 
large, pointed, dilating outwards and grooved. Oral tentacles 
grooved, about same size as the dorsal, with a furrow extending from 
beneath the right one along the neck and terminating in the back 
between the mantle lobes. Foot elongate, narrow, corrugated, and 
projecting posteriorly, where it is rounded. The siphonal tube is 
on the posterior lateral portion of the back, canaliculated and curved, 
and extending above the back. Shelllarge, covered by a thin mem- 
brane, ovately rounded, thin, fragile, with rugose lines of growth, a 
deep rounded sinus on the right side near the apex. Apex small 
and callous. Color purplish-brown, pale along the flanks, every- 
where above densely crowded with minute white dots, which on the 
sides are arranged in circular clusters forming spots. Foot pale. 
The young are of a very pale color. (Pse.). 
