The Siliqua denomination
The siliqua is the modern name given (without any ancient evidence) to small, thin, Roman silver coins produced in the 4th century A.D. and later.

When the coins were in circulation, the Latin word siliqua was a unit of weight defined as one twenty-fourth of the weight of a Roman solidus.
Siliqua

(1) Constantius II AD 357-361
Obverse: D N CONSTANTIVS P F AVG, pearl-diademed, draped and cuirassed bust right
Reverse: VOTIS XXX MVLTIS XXXX in four lines within wreath; SCON in exergue
Ref: RIC 261 and 291; RSC 342-3r; Sear 1...
(2) Constantius II 351-355 AD
Obverse: pearl-diademed head right; D N CONSTAN_TIVS P F AVG
Reverse: VOTIS / X X X / MVLTIS / XXXX within wreath; TES
Ref: RIC 163; C. 341
(3) Constantius II 347-350
Obverse: DN CONSTANTIVS P F AVG, diademed head right
Reverse: VOTIS XXV VOTIS XXXX, four lines in wreath. Mintmark ANT
Ref: RIC VIII Antioch 106; Sear 17931
(4) Gratian 367-375
Obverse: Draped Bust right "DN GRATIANVS P F AVG"
Reverse: Roma seated facing on throne, looking left, holding Victory on globe and spear, left leg bare "VIRTVS ROMANORVM"
Ref: RIC 58a
(5) Gratian 375-378
Obverse: DN GRATIANVS PF AVG, pearl-diademed, draped and cuirassed bust right
Reverse: RBS ROMA, Roma seated left on cuirass, holding Victory on globe and reversed spear
Ref: RIC 15b
(6) Julian II 360-363
Obverse: FL CL IVLIA-NVS PF AVG, right-facing draped bust
Reverse: VOTIS V MVLTIS X within wreath, mintmark LVG
Ref: None provided
(7) Valens 364-378
Obverse: Draped and cuirassed bust right " DN VALENS PF AVG"
Reverse: within wreath "VOT X MVL XX"
Ref: RIC 33b
(8) Valens 364-378
Obverse: DN VALENS PF AVG, diademed, draped and cuirassed bust right
Reverse: VOT V MVLT X in wreath
Ref: RIC 19b, Seaby 93a
(9) Valentinian I AD 366
Obverse: D N VALENTINIANVS P F AVG, diademed, draped and cuirassed bust right
Reverse: RESTITVTOR REI P, Valentinian, in military attire, standing facing, head right, holding labarum and Victory on globe; SLVG• in exergue
Ref: RIC 6c; Sear 19365