marmoreo, white as marble, as in III. 481. So ebuneus, III. 422, cereus, Hor. C. I. xiii. 2 seem to express colour only, like niveus and lacteus ( Virg. Aen.VIII. 660). In II. 536 is the combination “niveis argentea pennis ales”.
pollice. Cf. IX. 395, “lacrimas admoto pollice siccat”.