Subsequently Mrs.Barber gave a few examples under the head of "Indicative or Banner Colours," but she applied it to the distinctive colours of the males of birds, which I explain on another principle, though this may assist.] [Footnote 87: Quoted by Darwin in _Descent of Man_, p.

317.] [Footnote 88: In the _American Naturalist_ of March 1888, Mr.J.E.

Todd has an article on "Directive Coloration in Animals," in which he recognises many of the cases here referred to, and suggests a few others, though I think he includes many forms of coloration--as "paleness of belly and inner side of legs"-- which do not belong to this class.] [Footnote 89: For numerous examples of this protective colouring of marine animals see Moseley's _Voyage of the Challenger_, and Dr.E.S.
Morse in _Proc.

of Bost.Soc.of Nat.

Hist._, vol.xiv.