The radula is wide and more or less bent at the end.

Many also have a simple gut and a mouth with a radula.

Images of the radula can be seen in this reference.

The radula in this species is longer than the shell itself.

A radula has been found in one species, with seven teeth per row.

The radula, when present, has two or three teeth in a row.

The radula is a hard, rough plate in the mouth.

These supply nerves to the radula and other parts of the mouth.

This group is considered to be the most primitive in the family based on the radula and type of animal.

The radula has been lost a number of times in the Opisthobrancha.

The radula works like a file, ripping food into small pieces.

The mouth includes a radula, and in most cases, also a pair of jaws.

The radula extends from the first to third shell plates.

The radula is usually adapted to the food that a species eats.

The radula has three laterals on each side of the central tooth.

It has no discernible foot, and the radula is not preserved.

Species in this family do not possess a radula.

The majority are filter feeders and have no head or radula.

The radula is wide and has exactly nine teeth.

Their internal anatomy includes a radula and a primitive brain.

Toxoglossan radula: The middle teeth are very small or lack completely.

There are also various marine gastropods that lack a radula.

The radula has no central tooth, and there are five or six laterals on each side.

The reproductive system and radula was described by Wright (1963) in detail.

The radula has seven denticles (or small teeth), which are sometimes reduced.