iv CONTENTS. 



Page 



No. 13. — Reports on the Dredn-ing Operations off the West Coast of Central 

 America to the Galapagos, . the West Coast of Mexico, and in the Gulf 

 of California, in charge of Alexander Agassiz, carried on by the U. S. 

 Fish Commission Steamer " Albatross," Lieut. Commander Z. L. Tanner, 

 U. S. N., commanding. V. Report upon Rocks collected from the Galapa- 

 gos Islands. By George P. Merrill. July, 1893 235 



No. 14. — Contributions from the Petrographical Laboratory of the Harvard 

 University Museum. VI. A Basic^Dike in the Connecticut Triassic. By 

 L. S. Griswold. (1 Plate.) August, 1893 239 



No. 15. — Notes on^the Geology of, the Island of Cuba, based upon a Recon- 

 noissance made for Alexander Agassiz. By Robert T. Hill. (9 Plates.) 

 April, 1895 . , 243 



