Those with blood were divided into the live-bearing (mammals), and the egg-laying (birds, reptiles, fish).
ðoʊz wɪð blˈʌd wɜː dᵻvˈaɪdᵻd ˌɪntʊ ðə lˈaɪvbˈɛɹɪŋ mˈæməlz, ænd ðɪ ˈɛɡlˈeɪɪŋ bˈɜːdz, ɹˈɛptaɪlz, fˈɪʃ.