Чужеродные виды наземных слизней на Дальнем Востоке России

9 species of terrestrial slugs found by the present time in the Russian Far East and 3 of them are of invasive type: Arion subfuscus (Draparnaud), Deroceras reticulatum (Muller), D. caucasicum (Simroth) are under examination. The first species earlier known from the Southern Kuril Islands is new for Primorsky Krai and a whole continental part of the Far East. Distribution of D. reticulatum in the Far East is restricted by coastal area of the Okhotsk Sea. The most dangerous expanding invasion of Caucasian garden slug D. caucasicum in Primorye Territory is examined in details.