FIG. 5 in Biostratigraphy and taxonomy of polymerid trilobites of the Manuels River Formation (Drumian, middle Cambrian), Newfoundland, Canada

FIG. 5. — Agraulos ceticephalus (Barrande, 1846): A, internal cast of a cranidium, eye ridges present, two grooves visible (NFM F-2785 from 1.96 m); B, internal cast of a cranidium, one groove visible, occipital ring triangular in shape with projection of spine preserved (NFM F-3062 from 2.10 m); C, internal cast of a cranidium, occipital ring ending in a spine (NFM F-2841 from 2.40 m); D, internal cast of a cranidium, projection of occipital spine preserved (NFM F-2919 from 2.44 m); E, internal cast of a cranidium, eye ridges and occipital spine preserved (NFM F-2846 from 2.53 m); F, internal cast of a cranidium, eye ridges present, projection of occipital spine preserved (NFM F-3321 from 5.52 m); G, internal cast of a cranidium, eye ridges present, projection of occipital spine preserved (NFM F-2863 from 2.52 m); H, internal cast of a cranidium, two grooves visible, profile on the right shows that front is not as domed as it seems in overview (NFM F-3225 from 5.19 m). Scale bars: 1 mm.