Examination of the gill vasculature ofUrolophus jamaicensisconfirms structural differences in urolophid gill vasculature compared with other elasmobranchs. Differences include: 1) absence of a septalcorpus cavernosum;2) presence of a vessel conneaing the afferent filament arteries near the tip of each filament; 3) a vessel, possibly an extension of the afferent filament artery, that runs along the top of the filamentcorpus cavernosumwhich may connect the afferent and efferent filament arteries at the tip of some filaments. Additionally, a constriction indicating the presence of a sphincter muscle was noted on the efferent lamellar ar‐teriole inU. jamaicensis.This structure has not been previously noted in urolophids. The vascular structures in AtlanticU. jamaicensisare similar to those previously described in PacificU. paucimaculatusandU. mucosus.