Step 10: Inside the head, near the middle, lightly sketch a small circle for the dinosaur's eye. When you get the placement and shape right, darken the lines. Make the top and bottom pointier. In the middle of the eye, draw a dot for the pupil. Off to the side, draw a tiny circle to represent glare. Draw a couple of curved lines above and below the eye for the eyelids. Add more curved lines around the eye for the skin's wrinkles. To the left of the eye, draw a curved line with small, triangle-like shapes on top for the Styracosaurus' spiky brow.
Step 11: Use the line on the muzzle as a guide for drawing the horn on the nose. Follow the basic path of the guide and draw the shape of the horn around it. The shape of the horn should be wide at the base, get gradually thinner and end at a pointy tip. Add a few lines below the base of the Styracosaurus' horn for the wrinkles on the skin.
Step 12: Use the U-shaped line under the head as a guide to draw the top part of the Styracosaurus' mouth. The mouth is shaped like a bird's beak, so make the top part curved and the tip pointy. Add a wavy line above the beak for the fleshy base of the mouth.
Step 13: Draw the bottom part of the beak to the right and use the U-shaped line as a guide. Darken the right edge of the U- shaped guide to create the dinosaur's jaw. For the nostril, draw a slit shape on the edge of the initial circle guide.
Step 14: Draw a series of triangle- like shapes along the left edge of the initial circle for the other brow. On the right side of the head, draw a larger triangle- like shape for the spike on the cheekbone. Draw a smaller triangle-like shape on the left side for the Styracosaurus' other cheekbone spike.