. The biology of the amphibia. Amphibians. THE MODE OF LIFE HISTORY 49 genera which live in or near mountain brooks. The egg sacs of one of these, Ranodon, are fastened to the under sides of flat stones, beneath which water flows. The eggs are larger than those of Hynobius and fewer in number. The larvae hatch in a more mature condition, and their digits are shorter than in that genus. Apparently the dorsal fin is also reduced (Schmal- hausen, 1917). In Onychodactylus there is no dorsal fin and the digits are not only short but are equipped with horny claws. Further, their external gills are c
. The biology of the amphibia. Amphibians. THE MODE OF LIFE HISTORY 49 genera which live in or near mountain brooks. The egg sacs of one of these, Ranodon, are fastened to the under sides of flat stones, beneath which water flows. The eggs are larger than those of Hynobius and fewer in number. The larvae hatch in a more mature condition, and their digits are shorter than in that genus. Apparently the dorsal fin is also reduced (Schmal- hausen, 1917). In Onychodactylus there is no dorsal fin and the digits are not only short but are equipped with horny claws. Further, their external gills are comparatively short. It is apparent that the Cryptobranchidae have received their method of fertilization and general character of their egg capsules from the family Hynobiidae as a whole, while their short gills, reduced. 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 Noble, Gladwyn Kingsley, 1894-1940. New York : McGraw-Hill
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Keywords: ., bookcentury1900, bookpublishernewyorkmcgr, booksubjectamphibians
