shagreened meaning

The dorsum is shagreened; on the sides and venter skin is smooth.
"When full-fed just half an inch in length, of a dull reddish-green colour, thickly shagreened with minute white tubercles, scarcely, if at all, hairy; the head pale ochraceous, entirely hidden beneath the second segment; the segments increasing in width to about the fifth, the two anal segments slightly decreasing and above flattened, especially the thirteenth; the erectile organs very small; a dorsal pulsating line, somewhat darker than the rest of the body; a subdorsal series of pale green oblique streaks, one on each segment on each side from the third to the eleventh segment inclusive; no other conspicuous markings.
"When full-grown a little over a quarter of an inch in length, onisciform as usual; the head very small, black and shining, entirely hidden when at rest, being covered by the second segment; the colour of the body grass-green, with a dark green dorsal line from the third to the twelfth segment; two subdorsal series of short parallel streaks, each pair being divided from the next by the segmental constriction, these streaks paler than the ground-colour; an almost pure white lateral line below the spiracles, which is the most conspicuous of all the markings; the segmental constrictions rather deep; the whole surface of the body shagreened, being covered with very small whitish tubercles, from which spring very fine short colourless hair's.