1) Family limacidae 2) Mollusk family 3) Slugs 
Limacidae, common name the keelback slugs, are a taxonomic family of medium-sized to very large, air-breathing land slugs, terrestrial pulmonate gastropod molluscs in the superfamily Limacoidea. == Distribution == Distribution of Limacidae include western Palearctic. There are 28 species Limacidae in Russia and adjacent countries. == Anatomy == In...
(from the article `gastropod`) ...exterior spikes. Undoubtedly, this difference provides a method of species recognition among these snails. Other pulmonates depend on explicit ...
[n] - slugs
family Limacidae noun slugs