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Show 250 DR. F. H. H. GUILLEMARD ON BIRDS COLLECTED [Mar. 1 7, Borneo. The only examples of Iyngipicus ramsayi that I am aware of are in Capt. Wardlaw Ramsay's collection, and are believed to come from N.E. Borneo. In both these cases I would submit that the locality is not a matter of absolute certainty. With regard to Gerygoneflaveola it is worthy of remark that the Sulu examples of this species appear to be almost intermediate between Bornean birds and G. simplex of the Philippines. W e have thus three species of doubtful Bornean origin, and no less than ten times that number of Philippine birds. Of the latter, the following is a list; those marked with au asterisk being represented in Borneo by closely allied species. Table showing the Philippine Species occurring in the Sulu group but wanting in Borneo. Cacatua hsematuropygia. Prioniturus discurus. Tanygnathus luzoniensis. Tanygnathus burbidgei. Loriculus bonapartei. #Pelargopsis gigantea. *Centrococcyx viridis. *Rhipidura nigritorquis. #Cyornis philippensis. Oriolus frontalis. #Pycnonotns goiavier. *Ce? rychus mindanensis. Cisticola exilis. Parus elegans. Zosterops everetti. Dicaeum hypoleucum. *Cinnyri8 jugularis. Cinnyris juli£e. Corone philippina. *Calornis panayensis. Sarcops calvus. *Munia jagori. Osmotreron axillaris. Ptilopus raelanocephalus. Phabotreron brevirostris. Ianthoenas griseigularis. Macropygia tenuirostris. Turtur dussumieri. Gallus bankiva. Rallina euryzonoides. Such an immense proportion of Philippine forms is, however, only what would be expected after consulting the charts of the Archipelago. The Strait of Basilan shows soundings of from 30-40 fathoms only, and from that island south-westwards to Tawi-tawi the depths are such that a ship could easily anchor at almost any point on the submarine bank connecting the group. West of Tawi-tawi, however, the level of the sea-bottom completely changes, depths of 100 fathoms or more being obtained close in-shore, while in the fairway of the Strait (the Sibutu Passage) Captain Chimmo was unable to get bottom at 500 fathoms. The distance across the Strait is about eighteen miles, and the surveys hitherto made seem to show an equally precipitous slope of the eastern banks of Sibutu Island. W e are at present without exact information as to the soundings between Sibutu and Borneo, one point of which, Tanjong Labian, is distant only twenty miles, but as many islets, reefs, and sand-cavs are known to intervene, it is almost certain that they are not of any great depth. This Sibutu Passage thus seems to be the natural delimitation of the Philippine Archipelago, and though of the only two species obtained, or said to have been obtained, from Sibutu Island, Oriolus chinensis and Sarcops calvus, the latter at least is purely Philippine, I cannot help thinking that a more extended knowledge of its avi- |