Percy Sladen Trust Expedition. 



TRANS. LINN. SOC. SER. 2, ZOOL. VOL. XIV. PL. 2. 



W*JT* 



Fio. 1. Bird Island, N.N.W. part. Bush killed by erosion of sea. 



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Fig. "2. Dennis Island, S.W. part. Cliffs formed of guano. 



