_Maug_ (also called Mang, Mangs, Mauga, Monjas, Mougu, Saint Laurent, San Lorenzo, Tunas). _Medinilla_ (also called Bade, Bird, Farallon de Medinilla, Rocher). _Pagan_ (also called Pagon, Paygan, St. Ignace, San Ignacio). _Rota_ (also called Luta, St. Anne, Santa Ana, Sarpan, Satpana, Suta, Zarpane). _Saipan_ (also called (Saepan, St. Joseph, San José, Saypan, Siepan, Serpan, Seypan). _Sarigan_ (also called St. Charles, San Carlos, Sariguan, Sarigwan). _Tinian_ (also called Bona Vista, Buenavista, Temean, Tenian, Tiniamou). _Uracas_ (also called Guy Rock, Farallon de Pájaros, Pájaros, Urakasu). [Illustration: FIG. 2. The Mariana Islands.] PALAU ISLANDS [Illustration: FIG. 3. The Palau Islands.] The Palau Islands (also called Arrecifos, Palaos, Paleu, Pally, Paloc, Pannog, Parao, Pelew) consist of 8 large islands, 18 smaller islands, and a large number of minute islets, all enclosed in a single reef system. The northern islands (Babelthuap and Koror) are of volcanic origin; the southern islands (Peleliu and others) are of coralline formation. Angaur, to the south of Peleliu, may be included with the Palau Archipelago. From the standpoint of the avian zoogeography, the coral islands or atolls of Kayangel, Merir, Pulo Anna, Sonsorol, and Tobi are also included. The principal islands, shown in figure 3, are listed below: _Arakabesan_ (also called Ngarekobasang). _Aurapushekaru_ (also called Aburashokoru, Auluptagel, Oluksakel, Oropu-shakaru). _Babelthuap_ (also called Babeldzuap, Babel Taob, Babelthouap, Baberthaob, Baberudaobu, Babldaob). _Eil Malk_ (also called Amototi, Cogeal, Irakong, Makarakaru). _Garakayo_ _Koror_ (also called Coror, Goreor, Kororu). _Malakal_ (also called Amalakell, Malaccan, Marakaru, Nanalake). _Ngabad_ _Ngesebus_ (also called Guadokusu). _Peleliu_ (also called Pelelew, Periryu, Pililer, Peliliu, Uler). _Urukthapel_ (also called Cape, Kuapasungasu, Ngurukdapel, Ulugeang, Uruk-taaburu, Uruktapi). Included with the Palau group because of proximity and relationships of the avifauna are the following: _Angaur_ (also called Angauru, Angyaur, Ngaur, Ngeour, N'Yaur). _Kayangel_ (also called Kadjangle, Kajanguru, Kazyanguru, Kianguel, Kreiangel, Moore, Ngajangel, Ngeiangel). _Merir_ (also called Marir, Meliel, Meriel, Meriru, Pulo Marier, Warren Hastings). _Pulo Anna_ (also called Anna, Bul, Bur, Current, Paola, Pul, Puru, Wull). _Sonsorol_ (also called St. Andrew, San Andreas, Sonesor, Songosor, Sonseron, Sonsol, Sonsoru, Tschontil). _Tobi_ (also called Codopuei, Johnstone, Kadogubi, Lectobis, Lord North, Nevil, Togobei, Tokobei). CAROLINE ISLANDS