18, 540 Amount of suspended matter has 



approximately doubled over what it 

 was earlier. Many of the particles 

 appear to be about 1/4 inch in diam- 

 eter and very light in color. Nearly 

 white. One mysid, one Tomopteris. 



18, 600 Sea floor clearly shows the presence 



of burrowing organisms. White 

 patches mottle the tawny sea floor, 

 and represent sediment brought to the 

 surface by burrowing animals. One 

 moUusk shell, similar to Astrea of 

 shallower water; 2 inches in diameter 

 at the base and about 11/2 inches high. 

 Water current virtually nil. 



18, 600 (On leaving the bottom. ) One mysid, 



one Tomopt e r i s , 



18,150 One Tomopteris . 



15, 300 Some bioluminescence; four sustained 



greenish-white flashes. Observation 

 followed by a period of no biolumines- 

 cence. 



15, 060 Two bursts cf bioluminescence that 



remained evident until the bathyscaph 

 passed away from the object (30 sec- 

 onds). 



13, 500 Three greenish- white flashes. 



12, 600 Two flashes. 



'''2 00 A number of pieces of bioluminescence 



observed. One unit appeared as a 

 cluster until it was broken into fine 

 pieces in the turbulence of the bathy- 

 scaph. Perhaps it was a siphonophore. 

 Several other points of light evident. 



37 



