. The biology of the amphibia. Amphibians. 284 THE BIOLOGY OF THE AMPHIBIA. In the cloaca of the female salamander all three sets of glands may appear, although here they have different functions. The pelvic gland serves as a res- ervoir for the spermatozoa which migrate from the dis- integrating spermatophore held between the lips of the cloaca to these tubules in the roof of the cloaca (Noble and Weber, 1929). The cloacal glands which are present in all ambystomids, salamandrids, and primitive plethodontids, may play some part in egg- capsule formation. The ab- dominal glands are also
. The biology of the amphibia. Amphibians. 284 THE BIOLOGY OF THE AMPHIBIA. In the cloaca of the female salamander all three sets of glands may appear, although here they have different functions. The pelvic gland serves as a res- ervoir for the spermatozoa which migrate from the dis- integrating spermatophore held between the lips of the cloaca to these tubules in the roof of the cloaca (Noble and Weber, 1929). The cloacal glands which are present in all ambystomids, salamandrids, and primitive plethodontids, may play some part in egg- capsule formation. The ab- dominal glands are also de- veloped in female newts. They are present in Amby- stoma,Necturus,and Eurycea, although apparently rudimen- tary and non-functional. Their homologies with the male glands have been estab- lished by transplanting a testis into the body of the female. The spermatheca in the newt then changes into the pelvic gland, the rudimentary ab- dominal glands into a func- tional organ (Beaumont, 1928). It is interesting that in Desmognathus, where neither abdominal nor cloacal glands are present even as rudiments in the female, the same operation causes these two glands to sprout de novo from the undifferentiated epi- thelium of the cloaca of the adult female (Noble and Pope, 1929). Thus, even in the higher plethodontids the abdominal and cloacal. 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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