Puzzles like "Ship Arriving Too Late to Save a Drowning Witch"

[Tim Regan]

Hi All,

Does anyone know a good collection (online or book) of puzzles like 
the cover of this album:

http://www.amazon.com/exec/obidos/tg/detail/-/B0000009T4/

I.e. incomprehensible line drawings that the puzzle doer has to come 
up with (funny) answers to the question "What's this?"

What are such puzzles called?

Cheers,

Dumbledad.