216 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



mind the information above stated, I published the suggestion that 

 some of the Santo Domingan fossil corals are perhaps of Pliocene age. 1 



Recently Miss Carlotta J. Maury has submitted to me for study the 

 fossil corals she collected during an expedition to Santo Domingo. 

 She informs me that the zones on Rio Gurabo are lettered in strati- 

 graphically descending series, "A" being at the top and "G" at the 

 base of the section; zone H on Rio Cana is considered to be the same 

 as zone G on Rio Gurabo. Bluff 1 on Cercado de Mao is correlated 

 by Miss Maury with a part of the Rio Gurabo section above zone G, 

 and bluff 3 on Cercado de Mao is correlated with that part of the Rio 

 Gurabo section below zone F. 



As regards the corals, the definite stratigraphic tie-point is found 

 in zone H on Rio Cana, where three species which also occur in the 

 Bowden marl of Jamaica were collected. It has been stated on pp. 

 212, 213 of this paper that the Bowden coral fauna is stratigraphically 

 above the Oligocene faunas of Antigua, Bainbridge (Georgia), Lares 

 (Porto Rico), Empire (Panama), and Tampa (Florida). These Santo 

 Domingan corals, except those from zone G-H, therefore belong 

 stratigraphically above the horizon of the Bowden marl. In a manu- 

 script now almost ready for press I am describing as new six addi- 

 tional species of Placocyathus from Miss Maury's collection. These 

 are not entered in the table following. 



1 Washington Acad. Sci.- Jour., vol. 5, p. 489, 1915. 



