Gamochonia, by Ernst Haeckel in Kunstformen der Natur.
From top left, clockwise:
Histioteuthis bonnellii
Chiroteuthis veranyi
Pinnoctopus cordiformis
Octopus vulgaris(ventral)
Octopus vulgaris (dorsal)

Gamochonia, by Ernst Haeckel in Kunstformen der Natur.

From top left, clockwise:

Histioteuthis bonnellii

Chiroteuthis veranyi

Pinnoctopus cordiformis

Octopus vulgaris(ventral)

Octopus vulgaris (dorsal)