of sand, gravel, grass, or otherwise; and if so, is the mouth, the 

 snout, or the tail used for the purpose, or what ; and if so, how is 

 the material transported ; or do they make any excavation in the sand 

 or gravel ? 



56. Do they watch over their nest, if made, either singly or in 

 pairs ? 



57. "When are the eggs hatched, and in what period of time after 

 being laid ? 



58. What percentage of eggs laid is usually hatched ? 



59. What percentage of young attains to maturity ? 



60. What is the rate of growth ? 



61. Do the parents, either or both, watch over the young after 

 they are hatched ? 



62. Do they carry them in the mouth, or otherwise ? 



63. What enemies interfere with, or destroy, the spawn or the 

 young fish ? Do the parent fish devour them ? 



64. Are the young of this fish found in abundance, and in what 

 localities ? 



65. On what do they appear to feed ? 



I. Artificial Culture. 



66. Have any steps been taken to increase the abundance of this 

 fish by artificial breeding ? 



K. Protection. 



67. Are these fish protected by law, or otherwise ? 



L. Diseases. 



68. Has any epidemic, or other disease, ever been noticed among 

 them, such as to cause their sickness or death in greater or less 

 number ? 



