32 American Fisheries Society 



he regards these indices a suitable working basis, in no 

 way preventing the proper investigation of such ex- 

 ceptions as exist. 



Shelford, V. E., and Allee, W. C. An Index of Fish Environments 

 '12 Science N. S. Vol. XXXVI., No. 916, pp. 76-77. 

 '13 The Reactions of Fishes to Gradients of dissolved Atmos- 

 pheric Gases. Jour. Expt. Zool. Vol. 14. No. 2. 



Shelford, V. E., and Powers, E. B. Experimental Study of the Move- 

 '14 ments of Herring and other Salt-water Fishes. In prep- 

 aration. 



Wells, M. M. The Resistance of Fishes to Different Concentrations 

 '13 and Combinations of Oxygen and Carbon Dioxide. Biolog- 

 ical Bull. Vol. XXV., No. 6. 



