Figure 7. Diagram of slugs, showing two types of mantles, and alternate positions of the breathing pore (the arrow points to pore) relative to mid-point of mantle. Slugs at top (a,b) have the mantle located only anteriorly. This is often called a 'saddle-like' mantle. Slug 'a' shows anterior (relative to the mid-point) location of pore; slug 'b' shows posterior location. The slug shown below (c) has the mantle covering 2/3 of its body, but the anterior (head) region is exposed. Several slugs found in Florida have yet another mantle arrangement, wherein the entire dorsal surface is covered with the mantle.