¢ the designation number of the parent snail in order to correlate hatching with Xeray dose, Further spawning filled in the spaces bat- wean egg masses rendering identification dubious. Difficulty is being encountered in providing sufficient seration with the pump available. Weekly census of the snails is contiming, - During the month the Applied Fisheries Laboratory was visited by Dr. Simeon T.. Cantrill, Swedish Hospital, Seattle, Washington, Dr. Le Re Donaldson made a trip to Richland, Washington for conference April 27, 1948, with Dr. Shields Warren, Dr. Herbert Parker, Dr. 8. Cantrili, Dr. Failla, Mr. C. Shugg, Mr. Shaw, Mr. R. Hageman, i. W. K. Grane, Mr. Iawis, - . . 7 . * + t By wok mo +y : a, lf £ ~ f t t * ’ » wee . 2 Uys Mime . . a 1 | + and ur. Harris; and to visit the laboratory in the 100-F area, Dh cg Co “ Lpes od FP wal. : ape Pie Lauren R.. Donaldson, Director dm te, of Contract No.W-28-094-eng=33