Added "The Under Dog":

These images used to be on a post on Stathes' blog, but the image is broken currently. Thankfully I was able to find pics via the ol' Wayback Machine. Incidentally, wouldn't surprise me one iota if this is just the Snappy Cartoons version of this cartoon with a new title card and music added to it...
"With all respect to the great mousetrap."- Popeye, "The Spinach Overture" (1935)