54 Report of the President 



GEOLOGY AND EXTINCT INVERTEBRATES 



DEPARTMENT OF GEOLOGY AND INVERTEBRATE 

 PALEONTOLOGY 



Edmund Otis Hovey, Curator 



Through the generosity of Mr. J. P. Morgan, the Lacroix 

 collection of rocks and minerals from the pegmatite dikes of 



the United States was donated to the Museum. 

 Important _ f . „ . , . 



Acquisitions ^his co ^ ectlon comprises 229 choice specimens. 



Among the other gifts may be mentioned samples 

 of volcanic ash from Mt. Lassen, California, presented by Mr. 

 W. T. Gould; rocks from the terminal moraine at Hollis and 

 Jamaica, Long Island, presented by Dr. David S. Marshall, 

 and Mesozoic fossils from the Cordillera of Bogota, presented 

 by Dr. Jose M. Rosales. Choice collections of volcanic 

 bombs from Idaho, fossils from the Eifel district of Germany 

 and a small collection of fossilized wood from Florissant, 

 Colorado, have been secured through purchase. 



Through the aid of the Angelo Heilprin Exploring Fund, 

 Curator E. O. Hovey spent February, March and April in 



m , . . o T ,. revisiting the active volcanoes of the 



Martinique, St. Vincent _ ° , . 



and Guadeloupe Lesser Antlll es and in observing the 



changes that had taken place in that 

 region since his last visit in 1908. The size and depth of the 

 crater of the Soufriere of St. Vincent were determined with a 

 Y-level; many specimens were brought back to illustrate the 

 changes that have taken place in the rocks during the past 

 seven years, and scores of photographs were taken to add to 

 the extensive collections already in the possession of the 

 Museum as a result of former expeditions. 



During the greater portions of June and July, Assistant 

 Curator Reeds and Mr. P. B. Hill were in Porto Rico con- 

 ducting palseontologic and stratigraphic studies and 

 Porto Rico . ,. F , s t1 7 1 r -i j 



Survev ln ma ^ ln g a ^ ar g e collection of rocks, fossils and 



photographs to supplement these studies. The 

 collection consists of from 11,000 to 12,000 specimens, ten 



