Domenico Gnoli
There's a great selection of scans from Gnoli's "Beastiary" over at Giornale Nuovo.

Click here to see a drawing by Gnoli of an imaginary city.

Filippo Morghen - A Voyage To The Moon


2nd Gallery

Wolfgang Grasse
You can purchase a book of Grasse's art at this site.

Takato Yamamoto
You can see a few more paintings here.

This is apparently the official site although it only seems to be a front page for now.

W.R Leigh - The Things That Live On Mars

Beasts!
"BEASTS! is a 200 page, full-color hardback coming this fall from Fantagraphics and Jacob Covey. A gorgeous compendium of mythological and folkloric creatures, the text will be accompanied by full-page illustrations of each creature created just for this book. The jaw-dropping artist list includes 90 of the most talented pop culture artistes from the worlds of skate, rock, comics, scifi, children's books, "Fine Art" etc. Each artist has selected a creature from recorded descriptions of mythological (or perhaps just elusive) beasts and rendered their vision of it."

See more previews of the book here.

The Beast blog found thanks to Matt K

Curious Beasts
This gallery contains a couple dozen examples of strange monsters from vintage artworks. Click here to see 57 other odd looking creatures.

Link found thanks to BibliOdyssey

Artist Of Other Worlds!
Here is a 10 page comic illustrated by Alex Toth and Sy Barry about a man who paints strange beasts that come to life.

Fantastic Characters & Beasts of Russian Lore