D, Foot; i, tentacular processes of the mantle.
External tentacular muscle.
Tentacular blood-vessel arising from the cut arm-vessel in the small arm-sinus.
Thus in the recently discovered arctic genus Prosorhynchus the muscular and glandular extremity is protrusible, but in the allied Gasterostomum this organ is represented by a sucker with fimbriated or tentacular margins.
G, Vascular spaces in tentacular cavity of the tentacular crown into vascular spaces.
The vestibule of the mouth is the space bounded by the oral hood; this arises by secondary downgrowth of lid-like folds over the true oral aperture, and is provided with a fringe of tentacular cirri, each of which is supported by a solid skeletal axis.
Enteric pouch of the umbrella, in the left-hand figure, points to the cavity uniting neighbouring pouches near the margin of the umbrella and giving origin to TCa, the tentacular canal.
At the base of the head dorsally are a pair of flat tentacular lobes from the edges of which the cephalic filaments or captacula arise.
A pair of cerebral ganglia lie on the dorsal side of the oesophagus: they innervate the proboscis or head and its tentacular lobes and captacula.
- No tube-feet or papillae, but tentacular ampullae more or less developed.
- Tube-feet chirote Holothurian of the present, but tentacular ampullae family Holothuriidae, showrudimentary or absent.
- The Tentacular End of Phoronis, with most of the tentacles removed.
Regeneration of the tentacular end of the animal is of frequent occurrence.
4) corresponds with the proboscis " of Pterobranchia; the succeeding region, as far as the bases of the tentacles, with the collar; and the post-tentacular region with the metasome.