See "Encyclopedia of Anatomy and Physiology" article "Cephalopoda.
"A Naturalist's Voyage Round the World" by Charles Darwin
Therefore, we may infer that the simplest forms of the Cephalopoda took precedence of the more complex in time.
"The Geological Evidence of The Antiquity of Man" by Charles Lyell
This seems to be another link between the seven-headed dragon and these cephalopoda.
"The Evolution of the Dragon" by G. Elliot Smith
Cephalopodae, development of, 442.
"On the Origin of Species by Means of Natural Selection" by Charles Darwin
The contrivances for these purposes are sometimes wonderfully complex, as with the spermatophores of the Cephalopoda.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin
Analogous powers exist in certain Crustacea and Cephalopoda.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
This diversity, indeed, is strikingly illustrated by the eggs of the Cephalopoda.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1" by Various
In the mollusca, between 200 and 300 species of cephalopoda are enumerated.
"Principles of Geology" by Charles Lyell
The Cephalopoda are mainly characterized by the concrescence of the foot and head.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various
In this there are no corals, but great abundance of cephalopoda of the genera Ammonite and Belemnite.
"A Manual of Elementary Geology" by Charles Lyell