In most cases, the small lateral canals connecting the ampullae to the radial canal are of equal length, so that the tube feet are arranged in two rows, one along each side of the groove.
32.
They are present in the Leucosolenia ( a asconoid sponge ) at the body wall through which water enters the body or they are present in Scypha ( a syconoid sponge ) as a connection between incurrent canal and radial canal.
33.
As in other echinoderms, the radial canals give rise to lateral canals, but there are no ampullae, and clusters of three tube feet branch from the ends of each canal, except around the mouth, where they are found singly.
34.
"Ormoceras " is a characterized by its straight shell, more or less circular in cross section, and a relatively narrow subcentral siphuncle composed of globular segments in which the radial canals in the endosiphuncular canal system are straight and normal to the central canal.
35.
""'Huronia " "'is an actinocerid genus included in the Huroniidae along with " Discoactinoceras " and " Huroniella ", ( Teichert 1964 ) . " Huronia " is characterized by long siphuncle segments with the free part of the connecting rings only slightly inflated and by a narrow central canal and strongly curved radial canals located in the anterior part of each siphuncle segment
36.
The genus name, " Bazinga ", has two cultural references : firstly, as a colloquialism meaning " fooled you ! " uttered by Dr . Sheldon Cooper in the United States TV program " The Big Bang Theory ", as the small size means the species was probably mistaken as a juvenile of other species, such as the similar " Catostylus mosaicus "; the term " bazinga " is also given to a seven-string harp, and the straight radial canals of this new species are reminiscent of such strings.
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