ILLUSTRATIONS XV 



39. Radium distribution in the central Pacific 



(Oc. Inst.) 119 



40. Radium distribution in the western Pacific 



(Kroll) 119 



41. Radium distribution in the Romanche Deep 



(Kroll) 126 



42. Radium determination in a manganese nodule 128 



43. Water sampling near bottom (Koczy) 136 



44. Turbidity near bottom (Jerlov) 139 



45. Types of turbidity changes near bottom (Jerlov) 139 



46. Changes in water near bottom (Koczy) 141 



47. Deep-sea fish after a square meal (Murray-Hjort) 156 



48. Our largest deep-sea fish (R. Pettersson) 158 



