AFRO-INDIAN REGIONS. 



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About "five miles" beyond Manua, two mountain-lumps rose out of 

 the sea; and were found to be connected bj a coral reef, so as to form 

 a double islet ; called by the natives Ulasinga and Ofu. The Vin- 

 cennes passing near, marks of stratification again became distinguish- 

 able with the glass ; the layers now inclined, and in one place meeting 

 at an angle, or plicate. Open-mouthed caves occurred at the level of 

 the ocean, evidently not formed by the action of surf; but like similar 

 ones afterwards seen around Tutuila, original in the volcanic rock. 



Manua with Ulasinga and Ofu, are separated from the remainder 

 of the group by an interval of some sixty miles; but in clear weather, 

 the next island, Tutuila, is within the range of vision. The interval 

 has proved insufficient for any change in the vegetable growth. 



On the 10th, I parted from Mr. Brackenridge ; and went on board 

 the Porpoise, for the remainder of our stay at the Samoan Islands. 



On the lltli, the Porpoise passed Tutuila; next to Manua in 

 size, being only about three times as large ; narrow in shape, and some- 

 what elbowed, with mountain-ridges and peaks, the highest being 

 " twenty-three hundred and twenty-seven feet" in elevation. Tutuila 

 contains the fine harbor of Pango Pango; visited some days later; and 

 on the shores of which, I met with much cellular lava, intermixed 

 with conglomerate and other varieties of sedimentary rock, all more or 

 less altered by heat. 



On the 12th, in approaching and sailing along Upolu, we had a fine 

 view of this large island, and of the lofty broad-swelling mountain- 

 ridge, that occupies its whole length. On the loth, the Porpoise turned 

 towards the land, and entered the harbor of Apia. I landed with 

 others, and walked by the regular path about a mile and a half inland 

 to a small village ; returning in time for short excursions on either 

 hand along the sea-beach. The vegetable growth was much richer 

 and more varied than at Taheiti ; as was at once perceived, by the 

 numerous kinds of forest-trees. The geological structure, judging from 

 scattered blocks or boulders, seemed the same as that of Manua and 

 Tutuila. 



Beyond Upolu, we passed the islet of Manono. And a little farther 

 on, Apulima; an islet influencing the political history of the Samoans, 

 from being a stronghold ; " accessible only in one place." 



On the 15th, the Porpoise arrived off' Savaii ; the largest and loftiest 

 island of the group; being "a hundred geographical miles in circuit, 

 and twice as large as Taheiti." Its broad, central summit, probably 



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