GLACIAL-CONTROL THEORY OF CORAL REEFS. 



203 



Pelew Group 

 46. Angaur 



47. Pililu (Pililju) 

 Samoan Group 



48. Beveridge 

 Solomon Group 



49. Buka 



50. Nissan 



51. Santa Anna 



52. Shortland Islands 



Tonga Group 

 53 A'a or Kotu 



54. Eua 



55. Fotuha 



56. Mango 



57. Nomuka cluster 



40 Semper, Elschner. 



70 Elschner. 



30 Guppy. 



89 Frederici, Sapper, 



Codrington. 



60 Schmiele. 



? Guppy. 



? Guppy. 



? Lister, Agassiz. 



91 Guppy. 

 60 Lister. 

 45 Lister. 



18+ Lister, Agassiz. 



5 strand-hnes. No shelf. 

 Fringing reef. Central hol- 

 low. 



Chart notes shoal water for 

 4 km. off south point; else- 

 where no shelf. 

 No shelf. Fringing reef. 



UpUft differential, higher on 

 the north. 



Elevated atoll; interior, a 



lake with bottom 30 m. below 



sea-level. 



35-70 m. shelf on north and 



east; apparently none on 



south. 



Elevated atoll, with lagoon 

 1.5-18 m. below limestone rim 

 which is 35 m. above sea. 

 No shelf. 

 No shelf. 



Said to bear no raised reef of 

 recent date; elevation proba- 

 bly pre-Glacial. Shelf at 

 about 55 m. 



3 strand-hnes. Elevated atoll. 

 Wide shelf at 35 m. and less. 



