anterior end

They have no true head, although the anterior end is often slightly wider than the body.

The teeth were only found at the anterior end of the jaws.

The anterior end is not separated as a distinct head.

They may have an indentation on each side of the body near the anterior end.

The apex of the shell is at the anterior end.

The anterior end of the shell is darkened, and may be brown or purple.

The latter encloses either the entire body or only the anterior end.

Some species possess just a short internal groove at the anterior end.

The anterior end of the hemisphere is named the frontal pole.

Paired ganglia at the anterior end of the body serve as the brain.

Also at the anterior end is an oral sucker.

The narrow aperture is white with a brown coloration at the anterior end.

Behind the blades is the mouth, located ventrally at the anterior end of the body.

At the anterior end are three pairs of spines.

However, the anterior end of the optic nerve stops abruptly at the eye.

The mantle margins are also fused except for a small gap at the anterior end.

It has no necks or tubercles, and is pointed at its anterior ends.

The anterior end also has two light-sensitive eye spots.

The beaks are blunt and situated slightly closer to the anterior end.

It is shortened at the anterior end and elongated posteriorly.

Canalipalpata have a head located at the anterior end of the body.

The body of the fluke is covered in scales mostly concentrated at the anterior end.

The siphonal canal at the anterior end is usually short.