TABLES 



1 Measurements of sound speed, temperature, and salinity 

 from TRIESTE. . . page 32 



2 Bioluminescence observations. . . 3^-40 



3 Observations and measurements of daylight extinction. . . 44 



ILLUSTRATIONS 



1 Location of dives made off San Diego. . . page 12 



2-3 Marine fauna on floor of San Diego Trough at 4100 feet. . .25,16 



4 Location of dive descents off Guam and in Marianas 

 Trench. . .17 



5-7 Sea floor in Guam area, showing "black pebbles" and 

 exposed bedrock. . . 1 9-21 



8 Living whip coral attached to sheet of bedrock. . .22 



9 Sea floor at 18, 150- foot depth, showing evidence of 

 biological activity. . .24 



10 Sea floor at 18, 900- foot depth, showing exposed bedrock 

 and sediment cover. . .27 



11-12 Sea floor at 8350- foot depth, showing bottom ripple marks 

 and artifacts. . . 29-31 



13-15 Prototype multiple plankton sampler. . .46,47 



16 Prototype ambient pressure water and plankton sampler. . . 48 



17 Curve of sea water temperatures obtained by resistance 

 bridge. . . 50 



18 Biological fouling on Italian paint. . .52 



19-20 TRIESTE painted with Amercoat 85 and 33, before and 

 after fouling. . . 53,54 



21 TRIESTE painted with vinyl red formula 121. . . 55 



