166 PROF. OWEN ON NEW AND RARE CEPHALOPODA. 
In the account given by the government diver of the colony of Victoria, Australia, 
in his Report, as cited in the weekly journal entitled ‘The Colonies and India”, it 
appears that, pursuing his avocation in the estuary of the river Moyne, and having 
occasion to explore a hole in the bed, “his arm was seized by the tentacles of an 
Octopus, part of which he brought to shore, after mutilating his assailant with strokes 
of ‘a smalliron bar.’” ‘This part, probably consisting of the head with more or less of 
the crown and arms, “ being laid out, measured over 8 feet across.” 
We may assume this measurement to have been taken from the tip of one out- 
stretched cephalic arm to that of the opposite arm. Now the length of the longest 
arm of my Australian 7ritaxeopus (Plate XXIII. fig. 1) is 1 foot 11 inches ; the breadth 
of the head intervening between the third pair of arms is 2 inches 2 lines; so, from 
the tip of one of such arms to the opposite one gives 4 feet. 
If the Victorian diver took his measurements from tip to tip of the corresponding 
pair of acetabuliferous arms, and we deduct the breadth of the intervening part of the 
head according to the scale of Tritaxeopus, the length of such outstretched arm of the 
Moyne-river Octopod may be set down as 3 feet 10 inches; and the extent of the 
pair, with the intervening head reckoned at 4 inches 4 lines in breadth, would give 
8 feet 2 inches, closely agreeing with the diver’s statement. 
Stretching out the first dorsal pair of arms in a line with the body, the total length 
of Tritaveopus cornutus is 1 foot 6 inches ; allowing the like proportion to the dorsal 
arm of the Moyne-river Octopod, its total length may be set down as 3 feet. 
The ascertained differences in the proportions of arms, head, and body in the known 
species of Octopods do not, as a rule, support an inference of any notable error in the 
dimensions above estimated of the Moyne “Monster or Devil-fish,” respecting which 
the diver states :—“* After a while I found the grip begin to relax a little; but he held 
on until I had almost cut him to pieces; and then he relaxed his hold from the rock, 
and I pulled him up.” This statement, with that of the circumstances of the first 
attack, viz. the seizure of the diver’s arm, which he had thrust into a hole, by an arm 
of the Octopod, exemplifies the same habits of that form of Australian Cephalopod 
which have been noted in our common European Octopus. 
There seems then to be no sufficient ground for the heading “ Conflict of a Man with 
a Gigantic or Monster Cuttlefish,” superposed to the govern- Fig. 4. 
ment diver’s Report, copied from the official statement into the 
journal above cited. The assailant seems not to have been 
more than thrice the ordinary average size of the Octopus 
vulgaris. 
An Octopus with sucker-bearing arms of from 3 to 4 feet 
length, may well have afforded the subject of the accomplished 
Japanese sculptor (cut, fig. 4), whose work is graphically de- 
* Number for 24th January, 1880. 
