sand ripples. The result in this nrocess is that the clams die and end up 

 as windrows of empty and broicen shells. An examole of this recently 

 occurred in the Parker Mver in Ilewburj'^, Mass. A screened saniple of the 

 flat on September 23, 195U, jaelded Ii90 juvenile clams (2-l8mm. long) per 

 square foot. On October 22, 19iii4, a similar sample yielded only [1)4 clams 

 per square foot, the largest of which was 6 mm. in length; but the sampler 

 contained manj'' shell fragment? of juvenile clams of the size range found in 

 the first samole. 



;:eierences 



Hjulstrom, >11ip 



1939. Transoortation of detritus by moving water. 



Pp. 5-31 in Trask, barker ]). (ed.): liecent marine sediments; 

 a symposium. Am. Ass;i. Petrol. Geol. Tulsa, Okla. 736 pp. 



Kellogg, James L. 



1899. The life history of the co.amon clam, I'ij'^a arenaria. 



Rhode Island Commissioners of Inland i'^3heries 29th .inn. Rept., 

 np. ■jd-9S. 



Krumbein, ..'. C, 



19^2. Settling-velocitj'- and flurrie-behavior of non-snherical narticles. 

 Trans. Am. Geo.-'hy?. Union, op. 621-632. 



Menard, Henry W. , and A. J. Boucot 



19^1. Fxperiments on the mo-'ement of shells by water. 

 Am. Jour. J^ci. 2U9 (Februar;/ 1951): 131-l5l 



Smith, Osgood R, 



1952. Small clams move into a flat, see the sightj^, an(^ move on. 

 Main Co.;--st Fisherman, vol. 7, '.'lo. 3 (October), p. 20. 



Sverdrup, F. U., M. ..„ Johnson, and Yi. H. ]T.eming 



19!^?. The oceans, their hysics, chemistry, and general biology. 

 Frentice-Hall, Inc., \iGij York. IOO7 pp. 



13 



