. The biology of the amphibia. Amphibians. SEX AND SECONDARY SEX CHARACTERS 119 members of a different although ancestral family. Turning to the Salientia, many cases of glandular hypertrophies are found in the male sex but none is known to play any part in attracting the female. All species of Cycloramphus (Fig. 42B) have gland- ular pads in the inguinal region, and similar but more extensive glands appear on the sides of the body of Hyla rosenbergi. Pelo- bates has a pad of glandular tissue on the outer side of the upper arm where it could not function in the embrace, and a similar pad crops
. The biology of the amphibia. Amphibians. SEX AND SECONDARY SEX CHARACTERS 119 members of a different although ancestral family. Turning to the Salientia, many cases of glandular hypertrophies are found in the male sex but none is known to play any part in attracting the female. All species of Cycloramphus (Fig. 42B) have gland- ular pads in the inguinal region, and similar but more extensive glands appear on the sides of the body of Hyla rosenbergi. Pelo- bates has a pad of glandular tissue on the outer side of the upper arm where it could not function in the embrace, and a similar pad crops up in many species of Rana (the Hylorana group). In the African tree frogs, Leptopelis rufus and L, aubryi, sl pair of. Fig. 42.—Hypertrophied glands as secondary sex characters. The glandular mass at the tail base of the male Eurycea multiplicata (C) is employed to attract the female. The functional significance of the hypertrophied glands on the thighs of the male Mantidactylus luteolus (A), viewed ventrally, and in the inguinal region of the male Cycloramphus asper (B) is at present unknown. glandular patches appears on the chest of the male and would be assumed to function in holding the female. But in various pelobatids (Scaphiopus, Cophophryne, and some Megalophrys), a similar pair of pads appears in both sexes. Perhaps this is another instance of the inheritance of male characters by the female, but the Pelobatidae are far more primitive than the polypedatid tree frogs and hence presumably represent the primitive condi-. 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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