PLATE 10 
ScapMopus hammondii. All figures approximately natural size. 
Eig. 25. Adult male. 3986. 
Fig. 26. Adult female. 3985. 
Fig. 27. Adult male in water to show webbing of feet. 3989. 
Fig. 28. Adult male in act of croaking with vocal sac expanded; background 
and hand of operator painted out. 3987. 
Fig. 29. Egg masses in advanced and early stages of development. 3984. 
Fig. 30. Advanced stage of larva. 
Material for figs. 25-29 from Santa Maria, Santa Barbara County, collected 
April 9 and 10, 1923; that for fig. 30 from Jenny Lind, Calaveras County, collected 
April 9, 1922. 
[ 326 ] 
