This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Cynocephalus (Medieval Bestiaries)
The characteristic of cynocephaly, or cynocephalus, having the head of a canid, typically that of a dog or jackal, is a widely attested mythical phenomenon existing in many different forms and contexts. The literal meaning of cynocephaly is "dog-headedness"; however, that this refers to a human body with a dog head is implied.
Such cynocephalics are known in mythology and legend from many parts of the world, including ancient Egypt, India, Greece, and China. Further mentions come from the medieval East and Europe. In modern popular culture cynocephalics are also encountered as characters in books, comics, and graphic novels. Cynocephaly is generally distinguished from lycanthropy (werewolfism) and dogs that can talk.