364 Field Columbian Museum — Reports, Vol. i. 



late the studies of the Curator in the Flora of Yucatan. The itinerary 

 was made to include Bermuda; San Juan, Caguas, Ponce and 

 Guanica, Porto Rico; St. Thomas, Culebras Islands, San Domingo, 

 Jamaica, Santiago, Cayman Brae, Grand Cayman, Isle of Pines, 

 Cozumel, Yucatan and the Alacran Shoals. Nearly 2,000 sheets of 

 plants were secured and about 500 negatives were obtained by the 

 photographer who accompanied the expedition. A great many notes 

 were taken- A full report of this trip of three months is now in course 

 of publication in the Museum series. Upon the invitation of Mr. 

 Edward E. Ayer, Mr. Millspaugh also made a short trip to Flagstaff, 

 Arizona, and the Canon of the Colorado River. Although the excur- 

 sion was a hurried one, a large number of interesting specimens were 

 collected in this region. Under appointment as Honorary Special 

 Agent of the Department of Mines and Metallurgy of the United 

 States Commission to the Paris Exposition of 1900, Assistant Curator 

 Nichols spent about six weeks during the early summer in visiting the 

 zinc and lead mining regions of New Jersey, Pennsylvania, Virginia, 

 Tennessee, Kentucky, Southern Illinois, Missouri, and Kansas. 

 About 300 specimens were thus collected, illustrating the zinc and 

 lead ores of the regions visited, besides many choice specimens of the 

 minerals which accompany the ores. After being exhibited at the 

 Paris Exposition, the collection so obtained will become the property 

 of the Museum, and will form a valuable addition to the economic 

 collections now on hand. During the month of July an invitation was 

 extended by officials of the Union Pacific Railroad to the Curator and 

 assistants to join the Fossil Fields Expedition to Wyoming, then be- 

 ing organized. While appreciating thoroughly the courtesy of this 

 invitation, it was believed that larger results could be secured by 

 spending the time and funds available in work at one locality. Ac- 

 cordingly, Assistant Curator Riggs, and H. W. Menke as photog- 

 rapher and general assistant, were dispatched to a field near Medicine 

 Bow, Wyoming, where three months were devoted to collecting fossil 

 reptile remains in the Jurassic beds of that region. While it is yet 

 too early to judge accurately of the material obtained, there is no 

 doubt that the results will be highly satisfactory and that much has 

 ibeen secured along a line hitherto entirely unrepresented in the 

 TMuseum. About five tons of bones in the matrix have been shipped, 

 and a list received from Mr. Riggs quotes the following among the 

 material collected: 



Femur, tibia, scapula, coracoids, caudal, dorsal and cervical ver- 

 tebrae, ilium and ischium of Brontosaurus; femur, scapula, cervical, 

 dorsal, and caudal vertebrae of Morosaurus; femur, scapula, pubis, 25 



