The Quarter-Maiorina denomination
The quarter-maiorina was a fractional denomination struck in bronze rather than billon, in contrast with the half-maiorina and the maiorina.

The Maiorina was a billon coin replacing the heavily reduced centenionalis introduced by Constantius II and Constans in AD 348.

It was struck on two weight standards - 5,2 and 4,5 grams - but by the end of Constantius' reign in AD 361, this coin too had been reduced to a mere 1,9 grams.
Quarter-Maiorina

(1) Constans 348-350 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N CONSTA_NS P F AVG
Reverse: Constans standing on boat to the left, holding phoenix on globe and labarum; Victory sitting behind, steering boat with rudder; FEL TEMP__REPARATIO / TESE
Ref: RIC VIII Thessalonica 120
(2) Constans 348-350 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N CONSTA_NS P F AVG
Reverse: phoenix standing on mound right FEL TEMP REPARATIO / BSISЛ
Ref: RIC VIII Siscia 241
(3) Constantius II 348-350 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N CONSTAN_TIVS P F AVG
Reverse: Constantius II standing on boat to the left, holding phoenix on globe and labarum; Victory sitting behind, steering boat with rudder; FEL TEMP__REPARATIO / ASIS symbol
Ref: RIC VIII Siscia 237
(4) Constantius II 348-350 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N CONSTAN_TIVS P F AVG
Reverse: phoenix on globe right; FEL TEMP REPARATIO / CONS?
Ref: RIC VIII Constantinople 93