ambulacra

But here it might be argued, on the other hand, that the spheroidal Echinoids, in reality, depart further from the general plan and from the embryonic form than the elongated Spatangoids do; and that the peculiar dental apparatus and the pedicellariae of the former are marks of at least as great differentiation as the petaloid ambulacra and semitae of the latter.

Essays 2007

Having only a single specimen completely covered with spines, it is impossible to describe the form of the ambulacra or the disposition of the tubercles.

Journals of expeditions of discovery into Central Australia, and overland from Adelaide to King George's Sound, in the years 1840-1 2004

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 Various

When left alone, it now gnaws the front of its gallery, now rests, fixed by its ambulacra to the two sides of the channel.

The Glow-Worm and Other Beetles Jean-Henri Fabre 1869

When the larva wishes to move forwards, it expands its hinder ambulacra, those on the back as well as those on the belly, and contracts its front ones.

The Glow-Worm and Other Beetles Jean-Henri Fabre 1869

These are the organs of locomotion, the ambulacra.

The Glow-Worm and Other Beetles Jean-Henri Fabre 1869

But here it might be argued, on the other hand, that the spheroidal Echinoids, in reality, depart further from the general plan and from the embryonic form than the elongated Spatangoids do; and that the peculiar dental apparatus and the pedicellariae of the former are marks of at least as great differentiation as the petaloid ambulacra and semitae of the latter.

Lectures and Essays Thomas Henry Huxley 1860

But here it might be argued, on the other hand, that the spheroidal Echinoids, in reality, depart further from the general plan and from the embryonic form than the elongated Spatangoids do; and that the peculiar dental apparatus and the pedicellariæ of the former are marks of at least as great differentiation as the petaloid ambulacra and semitæ of the latter.

Lay Sermons, Addresses and Reviews Thomas Henry Huxley 1860

[ECHINOLAMPAS APPENDICULATUS] Test thin; body oval, depressed; margin thick or rounded; somewhat elongated, wider anteriorly than posteriorly; ambulacra narrow, open at their extremities; sub-petaloid; pores connected by furrows; mouth transverse; excretory orifice horizontal, marginal; madriporiform plate excentric; apical disk occupied by a sub-cordate sculptured plate, furnished with a pentangula opening, in the centre of which there is a pore; areolæ more numerous below than above; area around the mouth inflected.

Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds 1858

Having only a single specimen completely covered with spines, it is impossible to describe the form of the ambulacra or the disposition of the tubercles.

Journals of Expeditions of Discovery into Central Australia and Overland from Adelaide to King George's Sound in the Years 1840-1: Sent By the Colonists of South Australia, with the Sanction and Support of the Government: Including an Account of the Manners and Customs of the Aborigines and the State of Their Relations with Europeans — Complete Edward John Eyre 1858