224 Mr. W. E. Hoyle on the 



Off Twofold Bay, Australia, 150 fathoms (Station 163 A). 

 Two specimens, 1 $ , 1 juv. 



Octopms australis, n. sp. 



The Body is rounded, and wider behind than in front ; de- 

 pressed, and with a well-marked ventral median groove. 

 The mantle-opening extends nearly halfway round the body. 

 The siphon is of medium size, at first the lateral margins 

 are parallel and then taper rapidly to a blunt point ; it ex- 

 tends less than halfway to the umbrella-margin. 



The Head is narrower than the body, and the eyes some- 

 what prominent, dorsally rather than laterally. 



The Arms are unequal, the lateral being slightly the longest, 

 and about three times as long as the body; they are slender 

 and tapering. The umbrella is longer than the length of 

 the body, larger ventrally than dorsally, and largest of all 

 laterally. The suckers are prominent and closely set ; they 

 are altogether larger on the lateral arms, and extend in a 

 double row to the centre 5 the radial grooves are deep and 

 extend quite to the margin. The hectocotylus is absent. 



The Surface of the back of the body, head, and dorsal aspects 

 of the umbrella and arms is covered with thick-set hemisphe- 

 rical pimples, which are also found on the inner side of the 

 membrane between the two dorsal arms, and on the inner 

 surface of the arms between the suckers ; they are smaller 

 and more sparse on the ventral surface of the body. A large 

 rough cirrus and a few larger pimples are found over each eye. 

 A raised ridge passes backwards from the base of the siphon 

 along the ventro-lateral margin of the body, meeting its fellow 

 of the opposite side at the posterior extremity*. 



The Colour is deep purplish on the back, mottled on the 

 sides, and cream below. 



Hab. Port Jackson, Australia, 6-15 fathoms. Two speci- 

 mens, 1 ? , 1 juv. 



Octopus honghongensis, Steenstrup, M S. 



The Body is rounded, with a median ventral furrow, and 

 depressed (? from pressure). The mantle-opening is slightly 

 less than half the circumference, and terminates midway be- 

 tween the siphon and the eye, and a little behind the latter. 

 The siphon is comparatively short and conical, and extends 

 one third the distance to the umbrella-margin. 



The Head is comparatively broad, almost as broad as the 

 body, and the eyes appear to have been prominent. 



* I have considerable doubt whetber this be really one of the specific 

 character." ; but as it occurs in both specimens, I haAe thought it well to 

 mention it. 



