How To Use ambulacral In A Sentence
- The spiracles in orbitremitids pierce the adoral extremity of deltoid faces and are bounded laterally by ambulacral plates, which is the condition seen in the Chinese specimens.
- Echinoderms the interambulacral plates are absent; there are no rows of plates of a different kind alternating with the ambulacral ones, as in the Sea-Urchins and the Star-Fishes, but the ab-oral region closes immediately upon the ambulacra. The Atlantic Monthly, Volume 10, No. 57, July, 1862
- Notches (‘open’ lunules) are ambulacral lunules that form close enough to the ambitus that the ambitus is unable to close over the distal part of the notch to form a closed lunule.
- -- The ambulacral areas are narrow, but the poriferous zones are rather wide; and the interambulacral areas are about four times as wide as the ambulacral. Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
- (combs), from which they take their name of Ctenophorae, with the ambulacral (locomotive) apparatus of the echinoderms. Louis Agassiz His Life and Correspondence
- The longest ambulacral column is parallel and adjacent to the ambulacral-adambulacral furrow.
- The ambulacral grooves are narrow and the ambulacral ossicles are not exposed.
- As in non - stelleroid echinoderms, asteroid ambulacrals form a biserial column.
- These are broad concavities in the ambitus that could be considered precursors to the ambulacral notches of certain mellitids.
- [CIDARIS CAROLINENSIS] small tubercles with two in a row, and interspersed with minute ones, which appear in some places to be arrayed in subordinate rows; interambulacral areas wide, covered with small subequal and rather prominent tubercles, among which minute granules are scattered; area about four times as wide as the former; plates pentagonal, supporting two rows of large perforated primary tubercles, surrounded by plain circular zones; miliary zone concave or depressed. Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds