His chin sloped backward in pithecanthropoid style.

The large dorsal fins are subtriangular in shape, with the first dorsal spine sloping slightly backward.

His forehead sloped backward, and an enormous bony ridge dominated his brow.

Below was a malformed chin, that sloped backward, as did the forehead.

This is a prognathous skull, sloping backward, only slightly more than the seventy-degree angle that separates man from ape.

It was a mighty threatening face of the height of a score of tall forest pines set one upon the other, sloping backward to its crest.

Flat, short and upright rather than sloping backward.

Also, since the canyon cut across the rocks in an oblique direction, the layers also sloped backward into the hill.

From the beak the head sloped backward as if streamlined.

Her prow sloped sharply backward from the water-line--quite like a line of battleship.