102 Proceedings of the Royal Society 
but the stump shows no groove running up the outer ventral 
margin, 
The Surface is smooth ; an interrupted ridge starting from the 
base of the siphon passes backwards along the ventro-lateral margin 
of the body, probably due to contraction. There are three small 
papillae above each eye. 
The Colour is a pale bluish-grey above, shading into cream below. 
Habitat. — Off Twofold Bay, Australia, 150 fathoms. (Station 
163 a). 2 specimens, 1 <j>, 1 juv. 
y Octopus bandensis , Hoyle. 
Octopus bandensis , Hoyle, Ann. and Mag. Nat. Hist., ser. 5, vol. xv. p. 
227, 1885. 
The Body is rounded and depressed (? from pressure), and with a 
slight ventral groove. The mantle-opening terminates immediately 
below and behind the eye. The siphon extends as far as the 
umbrella-margin, and is acutely pointed. 
The Head is broader than the body, and flattened by compression ; 
the eyes are very prominent. 
The Arms are unequal, the third pair being much the longest and 
stoutest ; on the average they are four times as long as the body ; 
they taper gradually at first and then more rapidly. The umbrella 
is very small. The suckers are prominent, the first four being dis- 
posed in a single row ; and none are enlarged on the lateral arms. 
The hectocotylus is not developed. 
The Surface is smooth in general, but there are about twelve warts 
on the back and sides of the body, and a large cirrus over each eye, 
with several small ones near it. 
The Colour is deep black, apparently owing to treatment with 
osmic acid. 
Habitat. — Banda. I specimen, juv. 
Octopus marmoratus, Hoyle. 
Octopus marmoratus, Hoyle, Ann. and mag. Nat. Hist. , ser. 5, vol. xv. 
p. 227, 1885. 
The Body is round, not depressed and a little longer than wide. 
The mantle-opening extends somewhat less than halfway round the 
body, terminating nearer to the siphon than to the eye, and consider- 
