[Illustration: Fig. 54.--Brown cart horse, examined 25th October, 1914. Whorl, feathering and crest (W F C) in middle line of under surface of neck, beginning below where the collar should lie in usual position.] In the conditions described there is present exactly that frequent pressure of a moving body against the growing hair, which is requisite to produce changes in its direction, as well as the more fixed pressure of the collar when it is fitting firmly against the lower part of the neck. By way of confirmation of the view that this is the _modus operandi_ one has only to point to the other seven regions shown in Figs. 49 and 50, in which the connection between the pressure of harness and the production of a new pattern is beyond all doubt one of cause and effect. [Illustration: Fig. 55.--Brown cart horse, examined 25th October, 1914. Whorl, feathering and crest (W F C) in middle line of under surface of neck beginning underneath collar and proceeding vertically upwards for six inches.] [Illustration: Fig. 56.--Bright bay pony, examined 29th October, 1914. Very muscular neck. On under surface on each side a wide curving stream of hair passing towards middle line and joining in a central upward stream ending above in a tuft (T).] The Proof of Transmission of Pattern. _Third._--To show that the effects produced by pressure in one generation are sometimes inherited by its descendants it is necessary to examine a few examples of young horses who have never borne the yoke as yet. [Illustration: Fig. 57.--Brown hackney, examined 29th October, 1914. On under surface of neck beneath the lowest portion of an ill-fitting collar, a wide area of reversed hair on each side coalescing in a central upward stream.] [Illustration: Fig. 58.--Brown hackney engaged in drawing a low Swiss cart, with loose collar low on neck. Examined at the Croix in Jura mountains, 24th September, 1912. On lower surface of neck under the collar three reversed areas observed; one central (F), two (W, C) central and similar; all three showing a whorl, feathering and crest: central area placed vertically, lateral ones slightly oblique. _A very rare condition._]