47 2 MARIE A. HIXRICHS. 



PLATE II. FIGS. 31-52. 



Differential Recovery. Figs. 31-38. 



FIG. 31. Eggs exposed 15 minutes in 1/5,000 Benzo. i.soo-watt bulb, at 

 50 cm. 



FIG. 32. Eggs exposed 45 minutes in 1/5,000 M. blue. i,soo-\vatt bulb, at 

 50 cm. 



FIG. 33. Eggs exposed 15 minutes in 1/5,000 Benzo. i.soo-watt bulb, at 

 50 cm. 



FIG. 34. Eggs exposed 45 minutes in 1/5,000 M. blue, r.soo-watt bulb, at 

 50 cm. 



FIG. 35. Eggs exposed 15 minutes in 1/5,000 Benzo. i.soo-vvatt bulb, at 

 50 cm. 



FIG. 36. Eggs exposed 45 minutes in 1/5,000 Benzo. i.soo-watt bulb, at 

 50 cm. 



FIG. 37. Eggs exposed 45 minutes in 1/5,000 N. red. i.soo-watt bulb, at 

 50 cm. 



FIG. 38. Eggs exposed 15 minutes in 1/5,000 N. red. i,5OO-\vatt bulb, at 

 50 cm. 



Differential Inhibition Followed by Acclimation. Figs. 39-49. 



FIG. 39. Sperm (cone.) \ minute. Ultraviolet. 



FIG. 40. Sperm (dil.) 3 minutes. Ultraviolet. 



FIG. 41. Sperm (cone.) 3 minutes. Ultraviolet. 



FIG. 42. Sperm 10 minutes in 1/10,000 Eosin. i.soo-watt bulb, at 50 cm. 



FIG. 43. Sperm 30 minutes unstained, i.soo-watt bulb, at 25 cm. 



FIG. 44. Sperm (cone.) | minute. Ultraviolet. 



FIG. 45. Sperm (dil.) z\ minutes. Ultraviolet. 



FIG. 46. Sperm (cone.) i minute. Ultraviolet. 



FIG. 47. Sperm 10 minutes in 1/10,000 Eosin. i.soo-watt bulb, at 50 cm. 



FIG. 48. Sperm 30 minutes in 1/10,000 Eosin. i.soo-watt bulb, at 50 cm. 



FIG. 49. Sperm 30 minutes unstained, i.soo-watt bulb, at 25 cm. 



Differential Inhibition Followed by Recovery. Figs. 50-52. 



FIG. 50. Eggs exposed 15 minutes in 1/5,000 Benzo. i.soo-watt bulb, at 

 50 cm. 



FIG. 51. Eggs exposed 45 minutes in 1/5,000 Benzo. i.soo-watt bulb, at 

 50 cm. 



FIG. 52. Eggs exposed 45 minutes in 1/5,000 Benzo. i.soo-watt bulb, at 

 50 cm. 



