2.1.11 Program 19, Marine Survey (a) Objectives . 1. To study the effects of radiation from the Castle tests on various forms of life at Eniwetok Atoll. 2. To study the amount and distribution of radicactive materials in living plants and ar!mais at Bitini Atoll, 3. A requ:r? was added during the test series for a radiological survey of Lapardi and Kabelle Island:, Rongelap Atoll. “ (6) Techniques Biological specimens are collected for dissection at Parry Island. There they are weished and oven-dried before shipment to the United States for analysis. In a few cases rough analysis for radioactivity is done in the field. Representative locations are studied before and after the tests, and the effects of radiation on the life there are noted. (c) Results 1. Specimens were collected at Aaraanbiru and Aitsu Islands in Eniwetok Atoll. 2. As a result of shot-schedule changes, emphasis was shifted to Teiteiripucchi and Bogombogo. 3. Observations and collections were made on Rongelap Atoll. Marked radioactive contamination was found in many tissues. . 4. This study of the effects of radiation will be continued for 1 year. Most of the results are not available at present. “Praes Qo 13 Deleted.