PLATE 7 



EXPLANATION OP FIGURES 



R. sylvatiea. Representative speoimeus from sixty-nine complete and forty 

 ^Uitial autopsies. All removed organs were drawn with a camera lucida. 



Abbreviations: Ov., ovary; T., testis; S., spleen; A'., kidney; F. B., fat body. 

 Other abbreviations and dates as in plate 2. 



Ovaries, kidneys, and spleen. X 8 



79 Control larvae. 4/14 to 6/2/18. Alive: Tot., 45 mm., B., 18.5 mm.; 

 fixed: Tot., 42 mm., B., 17.5 mm. 



80 Thyroidless larva. 5/2 to 6/8/18. Alive: Tot., 45 mm.; fi.xed: Tot., 

 42 mm., B., 17.5 mm. 



81 Control frog. 4/14 to 6/5/18. Alive: Tot., 15 mm., B., 14 mm.; fixed: 

 Tot., 14 mm., B., 13 mm. 



82 Thyroidless larva. Alive: Tot., 53 mm., B., 22 mm.; fixed: Tot., 53 mm., 

 B., 21 mm. 



83 Thyroidless larva. 5/3 to 10/17/17. Alive: Tot., 65 mm., B., 22 mm.; 

 fixed: Tot., 60 mm., B., 21 mm. 



84 Thyroidless larva. 4/28 to 12/21 /17. Alive: Tot,, 54 mm., B., 22 mm.; 

 fixed: Tot., 50 mm., B., 21 mm. 



85 Thyroidless larva. 4/28/17 to 7/10/18. Alive: Tot., 68 mm., B., 22 mm.; 

 fixed: Tot., 56 mm., B., 22 mm. 



86 Control frog. 4/7 to 8/12/17. Alive: Tot., 14.5 mm., B., 14 mm.; fixed: 

 Tot., 14 mm., B., 13.5 mm. 



87 Thyroidless larva. 4/14 to 7/13/18. Alive: Tot., 65 mm., B., 24 mm.; 

 fixed: Tot., 60 mm , B., 23 mm. 



Testes. X 8 



88 Thyroidless larva. 5/2 to 6/8/18. Alive: Tot., 45 mm., B., 18 mm.; 

 fixed: Tot., 42 mm., B., 17.5 mm. 



89 Control larva. 4/18 to 5/28/18. Alive: Tot., 45 mm., B., 18.5 mm.; fixed: 

 Tot., 42.5 mm., B., 18 mm. 



90 Control frog. 4/14 to 6/5/18. Alive, 15 mm., fixed, 14 mm. 



91 Thyroidless larva. 4/14 to 7/15/18. Alive: Tot., 54 mm., B., 20 mm.; 

 fixed: Tot., 48.5 mm., B., 17.5 mm. 



92 Thyroidless larva. 5/3 to 10/17/17. Alive: Tot., 68 mm., B., 23 mm.; 

 fixed: Tot., 63 mm., B., 21 mm. 



93 Thyroidless larva. 4/28/17 to 7/6/18. Alive: Tot., 72 mm., B., 25 mm.; 

 fixed: Tot., 68.5 mm., B., 24.5 mm. 



64 



