Eyes
In terrestrial pulmonate gastropods, eye spots are present at the tips of the tentacles in the Stylommatophora or at the base of the tentacles in the Basommatophora. These eye spots range from simple ocelli that cannot project an image (simply distinguishing light and dark), to more complex pit and even lens eyes. Vision is not the most important requirement in terrestrial gastropods, because they are mainly nocturnal animals.
Some gastropods, for example the freshwater Apple snails (family Ampullariidae) and marine species of genus Strombus can completely regenerate their eyes. The gastropods in both of these families have lens eyes.
Morphological sequence of different types of multicellular eyes exemplified by gastropod eyes:
Read more about this topic: Sensory Organs Of Gastropods
Famous quotes containing the word eyes:
“Nature breaks through the eyes of the cat.”
—Irish proverb.
“The eyes that drew from me such fervent praise,
The arms and hands and feet and countenance
Which made me a stranger in my own romance
And set me apart from the well-trodden ways;”
—Petrarch (1304–1374)
“Physical love, so unjustly decried, forces everyone to manifest even the smallest bits of kindness he possesses, of selflessness, that they shine in the eyes of all who surround him.”
—Marcel Proust (1871–1922)