tholichthys

[Greek tholos =a dome, and ichthys=a fish.] Ichthy.: A pseudo-genus of Teleostean Fishes, founded on what are probably immature individuals of the Cyttide, Squamipennes, . tholichthys-stage, s. Ichthy.: A stage in the development of certain Teleostean Fishes, in which the young differ s0 widely from the adult as, in many cases, to have been taken for types of distinct genera. "In the Tholichthys -stage of Pom acanthus the frontal bone is prolonged into a straight lancet-shaped proce , nearly half as long as the body; the supra-scapular and præopercular proce es cover and hide the dorsal and ventral fins. The plates attached to the shoulder girdle remain persistent until the young fish has a umed the form of the adult."- Gunther : Study of Fishes , pp. 172, 173. thol-o-bāte, s. [ Gr.tholos =a dome, and basis = a base.] Arch.: A cupola and a base; that part of a building on which a cupola is placed. thō'-lus, s. (Lat., from Gr. tholos =a dome.] Arch.: An appellation given to buildings of a cir cular form. Vitruvius uses it to signify the roof of a circular building. Now frequently applied to the lantern which surmounts a dome. Specifically applied at Athens to the round chamber or Rotunda, in which the Prytanes dined.