0.4 inches.
3rd arm, do.do.

0.25 inches.
Breadth of body between the two first arms 0.13 inches.
Thickness 0.25 inches.
General colour of body, indigo blue, of a darkish tinge; down the centre of the back a white streak, terminating at the root of the tail; sides blue, tail blue, quite white underneath, its belly altogether resembling that of a frog; tail tapering to a point.
1st arm.

26 tentacula attached to the rounded paddle-shaped part of this arm, the centre tentacle more than twice the length of the others.

These tentacula were so delicate that at the slightest touch they fell off.
Those nearest the body were so small as to be almost imperceptible, gradually increasing in length as they approach the centre, and then decreasing to the other side.

Centre of paddle-shaped part white, tentacula blue and white, fringed with dark blue at the extremity.
2nd arm.