Arion euthymeanus

(Original description in French) The animal is of medium size, elongated, and almost cylindrical in shape. Its back is rounded, becoming thinner and slightly compressed posteriorly. The animal is slow, timid, and somewhat soft. It secretes abundantly a whitish mucus that is slightly shiny and very thick. The animal is tawny reddish-brown, ornamented with bands and nuanced with darker tones, as follows: a band exists on each side, somewhat broad, black, torn on its edges, and occupying the upper part of the flanks. The flanks are paler and ornamented, especially towards the posterior extremity, with gray, transverse, and broken faint lines. Following this band and delimiting the median space of the back is a zone of the same color as the general background. The middle of the back is obscured by a blackish shade, simulating a large band that starts from the mantle and extends to the mucous pore. This same part is ornamented with very thin, small spots, some of which are oval, and the others are elongated. The body wrinkles are slightly acute, visible but not very prominent, composed of tubercles that are fused together. …