. The Biological bulletin. Biology; Zoology; Marine biology. HABITS OF CRYPTOBRANCHUS ALLEGHENIENSIS. 17 The absence of black pigment in the eggs is probably corre- lated with the fact that they are laid in darkness. The eggs of Neelurus, which are also laid under cover, are likewise devoid of pigment- During the breeding season the water is unusually low. In one case a nest was found at the extreme water's edge, so that. Fig. 5. Unfertilized eggs of Cryptobranchus allegkenie?tsis, after two days' im- mersion in water. Natural size. the eggs were barely immersed, yet most of them were develop-
. The Biological bulletin. Biology; Zoology; Marine biology. HABITS OF CRYPTOBRANCHUS ALLEGHENIENSIS. 17 The absence of black pigment in the eggs is probably corre- lated with the fact that they are laid in darkness. The eggs of Neelurus, which are also laid under cover, are likewise devoid of pigment- During the breeding season the water is unusually low. In one case a nest was found at the extreme water's edge, so that. Fig. 5. Unfertilized eggs of Cryptobranchus allegkenie?tsis, after two days' im- mersion in water. Natural size. the eggs were barely immersed, yet most of them were develop- ing. In this way, by the periodical drying up of the water in swamps, may have originated the terrestrial nesting habits of Amphiuma, described by Hay ('88). Fertilization. — In a previous paper ('062), the conclusion was reached that fertilization in Cryptobranchus is internal. The evi-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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