455 Dominican Sections — Maury 39 



Zone E 



12 tO I 

 12— F 



10— D. 



e 



Zone F 



Zone G 





19 to 1. 



1.9— F. 





12— E. 



.7-A. 

 .2— B. 



* 



* * * 



■x- * * 





2 to G. 



14-I. 





.7 to 3. 



3-H 



Bulla River 





Rio Cana 





Zone H 



Zone I 





2 to 1. 



■ 5-A. 





1.8— F. 



.4-D- 



* 



* * * 



* * * 





11.5--I. 



14 to G. 





4—3- 



11.5-H. 





3-G. 



6-3- 



* -X- * 



7 to 3 



The faunal changes, represented by stars, are indicated by 

 a marked weakening of faunal bonds as evinced by the drop in 

 percentages. Zones G at Los Quemados, H and I at Caimito 

 and Bluffs 2 and 3 at Cercado form the lower formation and 

 Zones A-F at Los Quemados and Bluff 1 Cercado, the upper. 

 Strong bonds ally i and F, 1 and A and B, D and E, G and I, 

 H and I, 2 and 3, 3 and I, 3 and Bulla River. But F and G and 

 1 and 2 are sharply set apart. 



Evidence of the Corals. — As stated in Bulletin 29, we are 

 much indebted to Dr. Vaughan for his kindness in writing a re- 

 port on our corals and in obtaining for us from his colleagues 

 summaries of the evidence furnished by our Foraminifera, Bryo- 

 zoa, Echinoderms and Crustacea. The conclusions of Dr. 

 Vaughan and his colleagues have been of great assistance and 

 support. 



Dr. Vaughan, on examining our corals, discovered a faunal 

 break in this group in Zone H, Rio Cana at Caimito. This pre- 

 ceded the break in the molluscs, for those in H above the coral 

 bed are still closely allied to the fauna of I. One of our pro- 

 blems that remains to be cleared up is the exploration of the in- 

 terval between H and the Area patricia beds. By inference with 



