Hitchhiker's Guide to Rukl Chart 27

Mare Anguis (Bill Arnett)

Well named! I immediately thought "snake" when I saw it.

Unnamed valley (Bill Arnett)

Running from Eimmart NE toward the limb is a broad unnamed valley shown on Rukl 27 only as a slightly darker region. It extends approximately to the line from Seneca A and Hahn. Several shades of coloration could be distinguished along its length.