114 CALIFORNIA ACADEMY OF SCIENCES. [3D Ser., 



EXPLANATION OF THE FIGURES. 



Plate III. 



(Figs, all natural size excepting 8, 9 and 13.) 



Figs. 1, 2 and 3 represent fully grown males, 1 and 2 being the smooth- 

 skinned, wide-tailed, light-colored, water-dwelling form during the breeding 

 season. The specimen figured in No. 1 was soft and water-soaked. No 

 trace of the papillae could be seen. The soaked, puffy condition caused the 

 ' ' segmentation ' ' of the trunk to appear with unusual distinctness. 



Fig. 4. A young adult, the larval characters all gone excepting the gill- 

 stubs. 



Fig. 5. An individual about half metamorphosed. 



Figs. 6 and 7 represent the same specimen — a larva somewhat more than 

 half grown. 



Fig. 8. A four-year-old larva, twice natural size. 



Fig. 9. A larva, twice natural size, three days after leaving the egg-mass. 



Fig. 10. The legs and cloaca of a male during the breeding season — to 

 show the black soles, the femoral patches, and the ruga; and papillae of the 

 cloaca. 



Figs. 11 and 12, egg-masses; No. 11 seen as a transparent mass. This 

 mass had been deposited but a few hours. No. 12 seen as an opaque body, 

 showing the hilum, and the striae converging toward it. 



Fig. 13. Small fragment of a flat preparation of the epithelum of a pap- 

 pillated individual, showing the highly pigmented cells at the summits of four 

 papillae, and the orifices at the centers of three of these. 



