Going through my copy of Fairbairn's Crests, I find the following:
A horse’s head in complete armour bridled; A horse’s head in armour. (The depictions of these in Fairbairn's show the spike issuant from the chamfron that make it look more than a little bit like a unicorn's head, but the bridle makes it certain that this is a horse's head and not a unicorn's head.)
This crest was borne variously by: Blaney, Blayney, Boston, Cary, Coulthart, Darley, Dartey, Horsey, Maleverer
A hind’s head transfixed through the neck by an arrow.
This crest was borne by Shaw. Different Shaws have different tinctures for the hind’s head and the arrow, e.g., A hind’s head sable transfixed through the neck by an arrow or (Sir Eyre M. Shaw); A hind’s head transfixed through the neck by an arrow or headed and feathered argent (Shaw of London and Colchester, Essex).
There is also an Anderson who uses a crest of a hind’s head transfixed through the neck by an arrow, but the hind's head for Anderson is also issuant from a crest coronet.
I hope that this information is helpful.