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1. Eggs of Hyla pickeringii laid in the aquarium. 



2. Two egg-strings of Bufo lentiginosus americanus. A string from each oviduct. 



3. Egg-mass of Rana catesbeiana. A surface film 18 inches in diameter laid among 



dead sticks and old boards. 



4. A surface-packet of Hyla versicolor eggs attached to a Potamogeton leaf. 



