urochord at a

pl. [Mod. Lat., from Gr. our a the tail, and chorde a string, here the notochord.] Zool .: A name given by some authors to the Tunic at a (q. v.). The group is divided into (1) Perennichordata, in which the notochord is found in the tail only, and is retained through life; and (2) Caducichordata, in which the caudal notochord is present in the larva only or is never developed. The notochord, when present, may be regarded as having a distinct locomotory function. ŭr-o-cor-dỹ-lŭs, s. [Pref. uro-, and Gr. kordylë =a club, a cudgel.] Palæont .: A genus of Labyrinthodonts. Skull triangular, truncated behind, with a rounded snout; teeth small, slightly curved; ventral armor consisting of scutes in a chevron pattern, reversed behind. From various Coal-measures. *ür-o-cryp'-tus, s. [Pref. uro- , and Gr. kryptos =hidden.] Zool .: A genus of Bats, now merged in Saccopteryx (q. v.).