Biocasses
Biocasses was a Celtic tribe living in Armorica. Caesar did not mention about them in his writings. Pliny the elder mentioned them living next to the celtic tribe Véliocasses. Biocasses were living in the area of the present day Normandy region.
 
 

Silver stater of Biocasses.  c. 60 - 50 BCE.
Obverse: Head facing right.
Reverse: A galloping horse and wild Boar facing right.
Weight: ~4.5 grams. Diameter: 18 millimeters.
Reference:  LT.J.29.