Illustrated Companion to the Latin Dictionary/Pinnirapus

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

PINNIR'APUS. Any gladiator matched with a Samnite or Thracian, each of whom wore feathers (pinnae) in their helmets (as shown by the illustrations to those words) which it was an object of their opponents to snatch away, whence the name arose. Juv. iii. 158. Schol. Vet. ad l.