rhytidoma

[Gr. rhytidōma =a wrinkle.) [RHYTI-.] Ichthy.: A genus of Percide, with four species- pagos. Body oblong, compre ed, covered with of epiphleum inside the liber or mesophleum. minute scales imbedded in the thick skin. Spines of verticals but little developed, always in small number and short, and in some species disappear- ing entirely. rhy-sim-ě-ter, subst. [Gr. rhysis a flowing, a stream, and Eng. meter (q. v.).] An instrument for ships. It presents the open end of a tube to the impact of the current, which raises a column of mercury in a graduated tube. measuring the velocity of fluids or the speed of