1916.} A. L. Massy: Cephalopoda of the Indian Museum. 195 
mM. 
Length of funnel fe 5 
Diameter of largest sucker 2 
rr 5, eye opening 2 
Ocellus __... + 5 
Distribution.—Japan (Wiilker, Ortmann, Appellof, Berry) , 
Hong Kong and south of Papua (Hoyle). 
Polypus cyanea (Gray). 
Octopus cyanea, Gray, Brit. Mus. Cat., p. 15 (1849) ; Brazier, Aus. Mus. 
Cat. Sydney, p. 7 (1892). 
M £258 Akyab, Burma (/. H. Burkill)—One 2. 
This has an elongate body, widest at centre, and quite smooth 
except for a few very minute tubercles on dorsal mantle and arms. 
_Eves not prominent and without cirri. Mantle-opening placed 
just behind eye but much below it. Apex of siphon about on 
level with eyes and reaching nearly half way to umbrella. Siphon 
free for almost half its length and appearing to be without a 
funnel organ. Arms about four and a half times the length of the 
body and head, and six times the length of the body alone, very 
robust and long in proportion to size of body; semi-equal, the 
second and third being the longest, and the fourth a little longer 
than the first. Suckers very prominent and not very close; in 
two alternate rows except at the base where a few are placed 
singly. About the eleventh sucker from the base is very large 
and has eighteen to twenty radial grooves. The umbrella attains 
one-third to one-quarter the length of the arms, and is highest 
laterally, and considerably higher dorsally than ventrally. Colour 
pale lilac, produced by a sprinkling of minute black or purple dots 
on a buff ground; ventral surface paler with brownish and purple- 
red dots. A male specimen in the British Museum, labelled 
‘“ Octopus cyanea, Gray, Moreton Bay, between tide marks, Queens- 
land Museum,” very closely resembles this in general appearance, 
as well as in the absence of ocular cirri, the almost smooth body, 
the position of the mantle-opening, the shape of the siphon, the 
order and length of arms and the prominence of the suckers. The 
colouring of the Australian specimen is a little darker and the 
chromatophores on the arms are sometimes arranged in circles 
which is not the case with specimen M *255. It may be useful to 
add that the hectocotylized arm of the Australian specimen has a 
minute terminal organ measuring only 2 mm. on an arm of 
340 mm. ‘The sperm canal is unusually broad and its clear buff 
colour is sharply defined from the mottled oral and dorsal surface. 
Some suckers at the margin of the umbrella are much enlarged on 
the second and third arms. The principal measurements of 
specimen M *25* are appended :— 
mm. 
End of body to mantle-margin _... aS pe. LOD 
Ite Hee) see AYS enc an ran Psp eas 
Eye to umbrella eA of iat hs Oe) 
