Step 6: Under the middle circle, draw a couple of lines as guides for the spinosaurus' arms. Bend the lines to indicate the joints and add a few smaller lines at the end for the dinosaur's digits.

Step 7: Draw two long, curved lines that come to a point on the left side as a guide for the spinosaurus' tail.

Step 8: Draw a wide arc on top of the body as a guide for the spinosaurus' distinctive spines.

That's it for the initial sketch! From this point on, press harder with your pencil to get a more defined sketch.

Step 9: Draw the spinosaurus' eye inside the top arc and to the right of the circle. The shape of the eye is similar to a half circle. Add a line inside for the actual eyeball and a dot for the pupil. Shade the inside of the eyeball for a more detailed look. Add an arc above the dinosaur's eye for the brow and another arc to the right of it for the nasal crest between the spinosaurus' eyes.