Equinan

Equinans were a race of horse-headed humanoids.

Culture
Spacemaster was an Equinan rank apparently equivalent to that of Captain. (COMIC: The Wreckers)

Technology
The Equinans were a space-faring race. They utilised a device called the language monitor, a language translator. Worn about the neck, it offered bi-directional translation for the wearer and his conversational partners. (COMIC: The Wreckers)

History
The Fourth Doctor and Sarah Jane Smith encountered an Equinan spacemaster, Roppy. (COMIC: The Wreckers)