Assertion: gastropod's shell | /r/HasProperty | external
Facets:
value: sometimes
type: TEMPORAL
value: partially
type: DEGREE
Source sentences:
text: If the shell is partially external, it is usually small and is located on the posterior end of the mantle (see image below, far right).
text: A diverse group; adult body snail like or sluglike, usually with some coiling, may have a delicate external shell, but shell is sometimes internal or absent; radula usually present; external gill sometimes present; body may be narrow or broad, often wedge shaped with a broad, solelike foot on the underside; edge of foot may be drawn out on either side to form a flap or winglike outgrowths known as parapodia; front of body usually bears 2 tentaclelike sensory structures, but head structures often appear reduced; some shelled forms have an operculum
text: The shell can be internal or external.
text: The shell can be internal or external.