Fig. 14
From: From Land to Water: the Origin of Whales, Dolphins, and Porpoises
Differences in skull architecture between Indohyus (RR 207) and Pakicetus (H-GSP 96231). The red line indicates the distance, projected on the midline, between the middle of the orbit (eye) and the mandibular fossa (jaw joint). The green line indicates the minimal width of the skull