terebella

[Dimin. from Lat. terebra= a boring instrument.J 1. Surg .: A trepan or trephine. 2. Zool .: The typical genus of Terebellide (q. v.). The sheath consists of sand, pieces of shell, and other adventitious par ticles, held together by a glutinous secretion, from the body. The young when first they quit the eggs, are small, globular embryos, thickly covered with cilia. Then the body becomes elongate and the cilia collect in a band round the middle; eyes appear. Next the cilia diminish in size and disappear, the animal becomes able to creep along the bottom of the water; finally it builds its tube and moves about no more. Terebella Emmalina. Bot.: A gon us of plants founded by Ju ieu, now reduced to a synonym of Pistacia (q. v.). ter-e-brą, s. [Lat.=a boring instrument; tero , = to pierce.] Zool . & Palœont .: Auger-shell; a genus of Buc- cinidae (q. v.). Shell long, pointed, many whorled; aperture small; canal short; operculum pointed, nucleus apical. Animal blind, or with eyes near the summit of minuto tentacles. All the shells are smooth, and ornamented with variegated spots, 110, mostly tropical. Fo il twenty-four, from the Eocene of Britain, France, and generally red, brown, and orange. Recent species IMG:content-0917.png:[blocks in formation] IMG:content-0918.png:[blocks in formation] *ter-e-brāte, v . t. [Lat, terebratus , pa. par. of bore, pierce with or as with a boring instru- ment. "Earthworms being made in the most compleat man- ner po ible for terebrating the earth, and creeping where their occasions lead them."- Derham : Physico-Theology, bk. iv., ch. xii. těr-e-bra-těl-lạ, s. [Mod. Lat., dim in. from Lat. terebratus =perforated.] Zool. & Palæont .: A with twenty-five species distributed among several sub-genera. Shell smooth or radiately plaited; dorsal valve longitudinally impre ed; hinge-line approximately straight; beak with a flattened area on each side of the deltidium, which is incomplete, foramen large; loop attached to the septum. The terephthalic-chloride, s.