46 PAPERS FROM THE DEPARTMENT OF MARINE BIOLOGY. 



PHOTOC,Ry\PHS OF MAER ISLAND CORALS. 



The distribution of these corals is shown in table 3. They were col- 

 lected along "Line No. i " across the southeast reef-flat of Maer Island. The 

 photographs were taken by the author, and are of natural size. The 

 species were determined by Dr. T. Wayland Vaughan, and the specimens 

 are preserved in the National Museum, Washington, D. C. 



Plate 12. — Nos. 1 to 3. Pocillopora bulbosa Ehrenberg {fide Dana). All from the southeast 

 reef-flat of Macr Island, Murray Islands. 



No. I, from about 625 feet from shore in quiet water about 8 inches deep at low 

 tide, on a sandy bottom. 



No. 2, from about 1,200 feet from shore in slightly agitated water, about 14 inches 

 deep at low tide, on a rocky bottom. 



No. 3, from a shallow tide pool of the lithothamnion ridge, 1,790 feet from shore, 

 washed almost constantly by the breakers. 



No. 4. Serialopora hystrix Dana. From the southeast reef-flat of Maer Island about 

 1,200 feet from shore, in water about 15 inches deep at low tide, on a hard 

 rocky bottom. 



No. 5. Acropora {Rhabdocyalhus) murrayensis Vaughan. From the southeast reef- 

 flat of Maer Island 1,630 feet from shore, in water about 16 inches deep at low 

 tide, on a hard rocky bottom of broken coral. 

 Plate 13. — No. 6. Acropora (Lepidocyathus) hcbcs {D7\n^). From the southeast reef-flat of 

 Maer Island, Murray Islands. From about 800 feet from shore on a hard 

 rocky bottom, in water about 10 inches deep at low tide. 



No. 7. Acropora {Tylopord) digitijera (Dana). From the southeast reef-flat of Maer 

 Island, 800 to S50 feet from shore, in water about 15 inches deep at low tide. 

 Growing on a hard bottom of broken coral. 



No. 8. /^rro/)or(2(/jo/)ora)^rt///r-ra(Lamarck) var. a Brook. From the southeast reef- 

 flat of Maer Island, 1,200 feet from shore, in water 14 inches deep at low tide. 



Nos. 9 to 1 1 . Porilcs niayeri Vaughan. From the southeast reef-flat of Maer Island, 

 between 600 to 1,200 feet from shore, in water about 10 to 15 inches deep at 

 low tide. 



No. 12. Poriles murrayensis Vaughan. From the southeast reef-flat of Maer Island, 

 1,220 feet from shore, in water 16 inches deep at low tide, on a hard rocky 

 bottom. 



No. 13. Porites australiensis Viiughdn. From the southeast reef-flat of Maer Island, 

 450 feet from shore, in water about 6 inches deep at low tide, on a sandy bottom. 



No. 14. Porites murrayensis Vaughan. A "rolling stone" specimen from the south- 

 east reef-flat of Maer Island, aiiout 1,000 feet from shore, in water about 15 

 inches deep at low tide; hard bottom with little sand. 

 Plate 14. — No. 15. Porites auslralicnsis Vaughan. From the southeast reef-flat of Maer 

 Island, 620 feet from shore, on a sandy bottom, in water 10 inches deep at low 

 tide. 



No. 16. Poriles andrewsi Vaughan. From the southeast reef-flat of Maer Island, 

 600 feet from shore, on a liottom of coral mud and limestone sand, in water 

 about 10 inches deep at low tide. 



No. 17. Gonipora tenuidens (Quelch). From the southeast reef-flat of Macr Island, 

 500 to 550 feet from sliore, on a sandy bottom, in water about 15 inches deep 

 at low tide. 



No. 18. Caloseris mayeri Vaughan. From the southeast reef-flat of Maer Island, 

 between 800 to 1,050 feet from shore, in water between 10 to 15 inches deep at 

 low tide. This is closely related to the form described as Siderastrea spha- 

 roidalis Ortmann by J. Stanley dardmer (1904, Fauna and (leographv Mal- 

 dive and Laccadive Archipelagoes, vol. 2, suppl. 1, p. 936, plate 89, fig. 4). 



