Lucilla AE Sestertius. 161-166 AD. Rome. 

LVCILLAE AVG ANTONINI AVG F, draped bust right
HILARITAS S-C, Hilaritas standing left, holding long palm
 branch and cornucopiae. 

Cohen 31 (this obv. legend), RIC III 1742 var.
RIC lists the long legend only as LVCILLA AVG etc. 
without the E). Simply an omission in RIC?

With kind permission of www.edgarlowen.com, Nov. 2011.