Fig. 47. {upper) One of the most beauti- 

 ful of the deep-sea jellyfish is PenphyUiim. 

 When brought up out of the eternal dark- 

 ness it is rich turquoise and maroon. 



Fig. 48. {lower) A siphonophore often came in sight of the bathysphere window. It is a drifting 

 colony of animals with a gas-float adapted to the pressures of certain depths. 



