490 THE OCEAN WORLD. 
some other monster of the deep, which would account for its having 
quitted its native rocks in the depths of the ocean. Otherwise it 
would have been more active in its movements, or it would have 
obscured the waves with the inky liquid which all the Cephalopods 
have at command. Judging from its size, it would carry at least a 
barrel of this black liquid, if it had not been exhausted in some recent 
struggle.” 
“Ts this mollusc a calmar?” asks the same writer. “If we might 
judge from the figure drawn 
by one of the officers of the 
Aleton during the struggle, 
and communicated by M. 
Berthelot, the animal had 
terminal fins, like the cal- 
mars ; but it had eight equal 
arms, like the cuttle-fish. 
Now the calmars have ten, 
two of them being very long. 
Was this some intermediate 
species between the two? 
Or must we admit, with MM. 
Crosse and Fisher, that the 
animal had lost its more for- 
midable tentacles in some 
recent combat ?”* 
iach ey actuoa reader We now leave the section 
: . of the Decapoda, and com- 
mence the examination of 
the last two families of the Dibranchiate Cephalopods, which belong 
to the Octopoda. 
The fifth family, Octopodide, contains Eledone, Octopus, Pinnoc- 
topus, Cirroteuthis, Philonexis, and Scerugus, and contains Cephalopods 
having eight long arms, united at the base by a web; the suckers in 
two rows, which are sessile ; the eyes fixed; shell, two short styles 
enclosed in the mantle; the body united to the head by a broad 
neck-band ; no side fins. The body is oval, warty, and without fins 
in Octopus (Fig. 329). We have figured, as other species of the genus, 
O. macropus (Fig. 330), O. brevipes (Fig. 331), and O. horridus 
(Fig. 332); it is small and oblong, arms tapering and webbed, and 
suckers in a single row, in Zvedone. 
* The figure, Plate XXII., represents the animal with ten arms. 
