H W mark entrance to cave) cave rather more difficult to make captures, 4 only made, all females, skulls 1/5 to 1/4 ossified. Another colony examined on east side of island only small colony in coral cave in cliff face (about 400 yards from coast across coastal flat) Cliff only 30 feet high and cave entrance about 15 feet up the face. Nest well in in dark, colony of about 20 nests examined on 4/9/38. Birds present only numbered 6. 4 were caught, 2 males, 2 females, all skulls 1/4 or a little more ossified. Apart from these specimens examined in and about breeding colonies, specimens for collection (3 on Mare, 7 on Uvea and 6 on Lifu) were collected and skinned all at great distances from any known breeding colonies in an attempt to get adults only (Mare 2 miles, Uvea 4 miles possibly 5, Lifu 2 miles). Results as regard adults were disappointing and were as follows:- MARE IS. 3 immediately after or during breeding season. December 7th, 1938. ♂ 1/3 ossified, ♀ 1/2 ossified, ♀ 1/2 ossified. Two of these may possibly have bred but probably have not though they may be 12 months old. UVEA IS. 7 specimens, as follows 1 ♂ 1/3 ossified on 23/2/38 (February adults probably still attending young.) 1 on 25/4/38. 1 ♀ o.c.e. skull 1/2 ossified. (Adults ready to de-) (part or soon going,) 1 on 2/5/38. ♀ repose.skull 1/2 ossified. (young feeding for ) (themselves by this ) (date ) 2 on 8/5/38 ♀ immature gonads, skull 1/3 (Possibly both first) ossified (or second year im- ) ♂ slightly enlarged, skull (matures. ♀ possibly) 1/3 ossified (1st yr., ♂ 2nd yr. ) 2 on 9/5/38. 2 ♂ repose and repose +, skull 1/3 ossified.