标题：The sexual behavior of Anura. 5, Oviposition in the green frog, Rana clamitans, and the bull frog, Rana catesbeiana. American Museum novitates ; no. 1224
摘要："The oviposition behavior of the green frog, Rana clamitans, and the bull frog, Rana catesbeiana, induced by injections of homoplastic anterior pituitaries and witnessed in a laboratory habitat, is described. A possible course of evolution from the plinth type of spawning to the surface film type is discussed"--P. 6.
