Bat and dolphin embryo illustrate the process of forelimb enlargement (image) Society of Vertebrate Paleontology Share Print E-Mail Caption Figure 3 -- A bat and dolphin embryo illustrate the process of forelimb enlargement and hind limb reduction, respectively, in the orders Chiroptera and Cetacea. The fossil record shows that Eocene whales (Ambulocetus natans) still had hind limbs, but the earliest known bats looked much like modern Carollia perspicilata. Credit T. Hieronymus, K. Sears Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.