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Biol Bull 45: 303-324. (December 1923)
© 1923 Marine Biological Laboratory
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THE ENDOCRINE SYSTEM OF TYPHLOMOLGE RATHBUNI

EDUARD UHLENHUTH PH.D.1

1 From the Laboratories of The Rockefeller Institute for Medical Research, New York, N. Y.

1. Only in one, a sex-mature specimen, among 7 specimens of Typhlomolge rathbuni, is the thyroid completely absent; in the other 6 specimens rudiments of the thyroids are present.

2. The thyroid rudiments are undifferentiated epithelial cell masses located along the path of migration of the thyroid, typical for salamanders. They may contain a lumen, but never contain colloid and blood vessels.

3. Typhlomolge possesses 3 pairs of thymus glands.

4. The hypophysis is similar to that of other salamanders. But the partes tuberales are perhaps smaller than in the adult A. opacum and the pars nervosa is larger.

5. The postbranchial body resembles much that of other salamanders, but sometimes is shorter and lacking a lumen.






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Copyright © 1923 by the Marine Biological Laboratory.