28 



TABLE No. 6— Continued. 



Date. Source of oyster Diatoms in one Diatoms 



and water. litre of water. in oyster. 



May 10, '05, Jetties 5,284. 10,728. 



May 15, '05, Jetties 10,448. 1,814. 



May 20, '05, Jetties 3,763. 5,681. 



May 25, '05, Jetties 16,628. 15,557. 



June 8, '05, Jetties 19,947. 20,743. 



June 15, '05, Jetties 17,792. 19,744. 



June 22, '05, Jetties 14,248 18,393. 



May 15, '05, Reef 1-4 mil. below Leesberg 0.0 empty shells 



only. 



May 20, '05, Reef 1-4 mi. below Leesberg 0.0 1,795. 



May 25, '05, Reef 1-4 mi. below Leesberg 3,998. 5,203. 



June 8, '05, Reef 1-4 mi. below Leesberg 16,334. 15,276. 



June 15, '05, Reef 1-4 mi. below Leesberg 14,897. 13,822. 



June 15, '05, Reef 1-4 mi. below Leesberg 7,686. 10,097. 



June 15, '05, Buoy in gulf 18,339 17,992. 



June 24, '05, Buoy in gulf 17,429. 18.964. 



The figures given in the following table are averages of all 



the determinations made during INIarch and April, 1906. 



Date. Locality. Diatoms in one Diatoms in stomach 



litre of water. of one eyster. 



April, "L. H. Reef".. 16,787 18,296. 



May, "L. H. Reef" 18,904 17,998. 



March, Jetties 19,072 20,698. 



April, Jetties 20,173 18,265. 



March, Reef 1-4 mi. below Lees- 

 berg 16,987. 15,896. 



April, Reef 1-4 mi. below Lees- 

 berg 18,584. 19,794. 



Gulf Biologic Station, 

 Cameron, La., 



April 14, 1906. 



