- Oh you mean similar to this.
The fossils of Basilosaurus cetoides (Owen) and Zygorhiza kochii (Riechenbach) were the first of many fossil finds that show that modern whales, e.g. the humpback whales evolved from dog-like creatures known as Mesonychids. Both Basilosaurus and Zygorhiza, exhibit unmistakable characteristics of the terrestrial Mesonychids from which they developed. For example, their skulls retained many of the features of the mesonychids despite a pronounced elongation. Also, the primitive whales such as Basilosaurus pocessed the distinctive, teeth set of the Mesonychids with well-defined incisors, canines, premolars, and multirooted molar. In addition, these whales, e.g. Basilosaurus, had well-defined vestigial rear legs (Gingerich et al. 1990, 1993, Thewissen 1994).