PLATE Il. 
PHOTOGRAPHS TAKEN WITH CAMERA SUBMERGED. 
The photographs shown in this plate are reproduced without retouching from originals made on orthochromatic plates with a color 
screen by the use of a reflecting camera inclosed in the water-tight box de ved in this paper. The exposures were made in 
sunlight in about 4 feet of water at 11 a. M. at Tortugas, Fla., and lasted j; second. For further description see text, page 65. 
