The Journal of experimental zoology . 100 67 PLATE 9 EXPLANATION OF FIGURES R. sylvatica. Testes 104 A, T. S. Control larva at beginning of metamorphosis (July 29, 1917).X 34. B, same, showing beginning of tubule formation, but no synapsis. X 240. 105 A, T. S. Young control frog. X 34. B, same. X 240. 106 A, T. S. Thyroidless larva larger but of same age as larva of figure104. X 34. B, same, showing advance in tubule formation, but no 240. 107 A, T. S. Large thyroidless larva, killed four months after thyroidectomy(August 20, 1917). X 34. B, same, spermatogenesis begun. X 240. 108 A
The Journal of experimental zoology . 100 67 PLATE 9 EXPLANATION OF FIGURES R. sylvatica. Testes 104 A, T. S. Control larva at beginning of metamorphosis (July 29, 1917).X 34. B, same, showing beginning of tubule formation, but no synapsis. X 240. 105 A, T. S. Young control frog. X 34. B, same. X 240. 106 A, T. S. Thyroidless larva larger but of same age as larva of figure104. X 34. B, same, showing advance in tubule formation, but no 240. 107 A, T. S. Large thyroidless larva, killed four months after thyroidectomy(August 20, 1917). X 34. B, same, spermatogenesis begun. X 240. 108 A, T. S. Large thyroidless larva, six months after thyroidectomy. X , same, showing spermatozoa in tubules. X 240. 109 Large thyroidless larva one year older than that shown in figure fully matured testis. V. E., efferent tubule leading into kidney and con-taining spermatozoa. X 34. GROWTH OF AMPHIBIA AFTER THYROIDECTOMY E. R. HOSKINS AND M. M. HOSKINS. 107 ^^^^
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1919
