SNAKE IN THE HOLLOW is illustrated, as shown upper left, in Maggie Malone's 5,500 compendium (#3463). But the assembly as a four patch (upper right) is a variation on her version, emphasizing the snake eyes, along with its long, undulating length, for which compare with the double circle, drunkard's path design, SNAKE'S TRAIL, at this site.
See also Malone's 1001 PATCHWORK DESIGNS (#937), Judy Rehmel's QUILT I.D. BOOK (#475), and Barbara Brackman's fine ENCYCLOPEDIA, where it is attributed to Quilter's Newslstter Magazine, #100, 1978
Malone also has a delightful selection of pictorial quilt designs, representing a whole jungle of wonderful creatures, with fish, birds (with a fabulous, exotic Toucan #4793), insects and other reptiles, including a magnificent crocodile, #4900, a frog, #4802 and lots of odd mammals, like the hippopotamus #4811. See her full color 5,500 QUILT BLOCK DESIGNS, pp. 370-382.
Compare at this site with other creature blocks:
TOAD IN A PUDDLE
AUNT PATSY's PET
BIRDS IN THE AIR
BUTTERFLY IN THE GARDEN
BUTTERFLY IN CIRCLES