97. Up to this date probably juveniles of this year may not be ranging far from nesting colonies and shooting at distances captured only birds bred the previous season (possibly have bred or not bred according to whether they breed at 12 months or 24 months) or possibly adults though none were taken truly adult. Flying altitude has no bearing on sex or age Samples were taken at all heights. Height of flying in- sect blanket of greatest density controls all birds irres- pective of age or sex. LIFU IS. 6 specimens as follows 8/8/38 ♂ repose. skull damaged probably 1/4 ossified. ♂ repose +. skull 1/4 ossified. 12/8/38 ♂ repose. skull 1/4 ossified ♂ repose. skull 1/3 ossified. ♀ repose. skull 1/2 ossified. (possibly 2nd year lived) 13/8/38 ♂ advancing skull 1/3 ossified (seems to show breeding) (at 12 months for males) E.M.: (One thing shown definitely by the above is the utter futility of collecting in or near breeding colonies. Whether or not my conclusions are correct and as the available data is very scanty they quite likely are, at least some unusual form of movement or ossification and possibly breeding is shown. Maybe you can get some valuable steers from the above dope). It at least looks from the above data as if my sur- mises may be correct but considerably more detailed data and study is necessary. Another factor observed on Uvea which seems to point to a movement from that island, at least to other areas is as follows:-