that whelks can do a considerable amount of 

 damage; and if they are present on the oys- 

 ter beds, trapping should be conducted each 

 spring to keep them under control. 



By using the method of trapping de- 

 scribed in this report most channeled whelks 

 can be removed from an oyster bed. Because 

 each oyster lease varies in size and shape, 

 the oyster grower can determine by trial the 

 number of traps to be used on his grounds 

 and their most effective arrangement. 



COLTON, H, 

 1908. 



How Pulgur £ind Sycotypus eat oys- 

 ters, mussels, and clams. Pro- 

 ceedings of the Academy of Natural 

 Sciences of Philadelphia, vol. 60, 

 pp. 3-10. 



MAGALHAES, HULDA. 



1948. An ecological study of snails of 

 the genus Busycon at Beaufort , 

 North Carolina. Ecological Mono- 

 graphs, vol. 18, pp. 377-409. 



LITERATURE CITED 



CARRIICER, MELBOURNE ROMAINE. 



1951. Observations on the penetration 

 of tightly closing bivalves by 

 Busycon and other predators. 

 Ecology, vol. 32, No. 1, pp. 73- 

 83. 



SUMNER, F. 

 L. 

 1913. 



WARREN, S. 

 1916. 



B., R. C. OSBURN, AND 

 J. COLE. 



A biological survey of the waters 

 of Woods Hole and vicinity. Bul- 

 letin of the Bureau of Fisheries, 

 vol. 31, (part I), (1911), 544 pp. 



Feeding habits of Busycon . 

 Nautilus, vol. 30, pp. 66-68. 



MS #913 



INT.DUP..D.C,60- 752m 



