is represented in the Parliament of Tuvalu by members of the constituency of Niutao. At least 11 islands are inhabited, expanded over the biggest isles of the nine atolls, plus two islands in Funafuti. Tuvalu has ISO 3166-2 codes defined for 1 town council (Funafuti) and 7 island councils. Niulakita, which now has its own island council, is not listed as it is administered as part of Niutao. Royal Society of London investigation of the formation of coral reefs at Funafuti An expedition (Funafuti Coral Reef Boring Expedition of the Royal Society) under Professor William Sollas of Oxford University, conducted by the Royal Society of London carried out drilling on the coral reef at Funafuti in 1896, 1897 and 1898. HMS Penguin, under the command of Captain Arthur Mostyn Field, delivered the 1896 expedition to Funafuti in the Ellice Islands, arriving on 21 May 1896, and returned to Sydney on 22 August 1896. From 1896 to 1899 the Penguin was under the command of Captain Arthur Mostyn Field and her surveying work included further voyages to Funafuti atoll to deliver the expeditions of the Royal Society in 1897 and 1898. The surveys carried out by the Penguin resulted in the preparation of the Admiralty Nautical Chart 2983 for the islands. The Royal Society of London were investigating the formation of coral reefs and whether traces of shallow-water organisms could be found at depth in the coral of Pacific atolls. Three expeditions used drilling equipment to take core samples of the coral reef. The boreholes on Fongafale islet are at the site now called Darwin's Drill, A goal of the expeditions was to drill down to confirm that the coral material was located on a base of volcanic rock. This investigation followed the work on the structure and distribution of coral reefs conducted by Charles Darwin in the Pacific. However, the geologic history of atolls is more complex than Darwin (1842) and Davis (1928) envisioned. First expedition (1896) The expedition was led by Professor William Johnson Sollas of the University of Oxford and included Professor Edgeworth David and Walter George Woolnough of the University of Sydney. Second expedition (1897) The expedition was led by Professor Edgeworth David of the University of Sydney (that included George Sweet as second-in-command, and Walter George Woolnough). Third expedition (1898) The expedition was led by Alfred Edmund Finckh of the University of Sydney. Results of the