References 
More complete information on certain of the topics discussed in this 
publication is available in the following mimeozraphed leaflets that may be 
obtained from the Bureau of Biological Survey, U. S. Department of Agricul-— 
ture, Washington, D. C.s; 
Poisonous Snekes of the United Stetes (with recommendation of treat- 
ment for snakebites). (Bi-571.) 
Food Habits of Fish-cating Birds. (Bi-1228.) 
ne present situation regarding eelgrass, Zostera marina. (BS-3.) 
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