AQUA TIC COLLECTING 17 



11. Write a general descrij)tion of the region before you 

 begin to collect. Describe fully and carefully the main features 

 of the locality examined. This should be full enough to give a 

 stranger a fair idea of the locality. It should include the ap- 

 proximate size of the stream, character of its banks, bottom, 

 depth of water, vegetation, etc. 



12. Fill the jar two-thirds full of water before beginning 

 to collect, and preserve the animals collected in the jar. 



13. Wash the mud from the net as directed before attempt- 

 ing to sort over and examine the collection. Sort the materials 

 upon the bank of the stream, in the net, and throw the refuse 

 back into the stream. 



14. Rinse out the net before leaving the field. 



15. Before returning to the laboratory be sure you have 

 everything with which you started. 



REFERENCES 



Needham, Jas. G. and Lloyd, J. T. 1916. The Life of Inland 

 Waters. Comstock Publ. Co. 



Shelford, Victor E., 1913. Animal Communities in Temperate 

 America. Universitv of Chicago Press. 



