' Challenger ' Cephalopoda. 227 



body. The umbrella extends about one third up the arms, 

 furthest between the lateral pairs. The suckers are large, 

 close, and prominent, with a narrow margin marked off from 

 the basal portion ; the radial grooves extend to the margin and 

 form notches in it. The hectocotylus is not present ; the third 

 right arm has been mutilated, 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 papilhe above each eye. 



The Colour is a pale bluish grey above, shading into cream 

 below. 



Hab. Off Twofold Bay, Australia, 150 fathoms (Station 

 163 a). Two specimens, 1 ? , 1 juv. 



Octopus bandensis, u. sp. 



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 com- 

 pression ; 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 form being disposed 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. 



Hab. Banda. One specimen, juv. 



Octopus marmoratiiSj n. sp. 



The Body is round, not depressed, and a little longer than 

 wide. The mantle-opening extends somewhat less than half- 

 way round the body, terminating nearer to the siphon than 

 to the eye and considerably behind the latter. The siphon is 

 small and acutely conical, and extends about one third the 

 distance to the umbrella-margin. 



The Head is narrow and the eyes are prominent where they 

 have not suffered from compression. 



