Crossword Creatures

Across
1. guardian of the underworld; dog with triple heads
2. monster was half woman and have serpent
3. malevolent monster with six heads and twelve feet
4. one of the gorgons; snake haired woman
6. immortal winged horse
7. 100 heads was the offspring of Gaia and Tartarus
Down
1. a deadly whirlpool personified as a female monster
5. head of a woman and the body of a lion