Bratley, D.A. 1964 Sand Island, Johnston Is. Atoll (Notes) June 20 (cont) p2 Seven of these 100 were known age, either having been marked with color bands (numbered) at a previous date or the hatching date was known. These birds were weighed + length of bill, wing, + middle toe taken. The data as follows: Band No. Hatching Date or color band # No. grams of weight bill length (mm) Rwing (mm) mid toe (mm) 753-26201 4/2/64 157.3 275 171 35 -26202 blue # 88 202.2 315 230 42 -26206 " # 86 190.5 335 235 40 -26211 " # 85 210.0 335 223 41 -26246 red # 146 223.0 370 225 38 -26262 blue # 78 207.5 310 220 38.5 -26263 " # 76 199.1 330 221 38 Ten (10) color banded immatures were collected as specimens, however, only 8 were the numbers legible. One blue + one red color band could not be read. The numbers as follows: blue # 79 red # 132 " # 81 # 134 " # 87 # 142 " # 91 # 143 Twenty-nine (29) adults (nesting) also banded.