NO. 4 COOPERATIVE WORK OF THE INSTITUTION 23 



Montana in 19 13 to investigate the reported occurrence of vertebrate 

 fossils in the Two Medicine formation, which work resulted in the 

 acquisition of a good collection and the establishment of the first 

 vertebrate faunal list of that formation. Extensive collections made 

 by Survey parties in the San Juan Basin, New Mexico, in 1914-1915, 

 were studied and described by Mr. Gilmore, thus establishing definite 

 vertebrate faunas for the Ojo Alamo, Kirtland, and Fruitland for- 

 mations. In 192 1, Mr. Gidley, in cooperation with the Survey, made 

 extensive collections in the San Pedro Valley, Arizona, thus settling 

 certain involved questions of stratigraphy regarding the late Tertiary 

 and early Pleistocene deposits on which the Survey had been work- 

 ing for a number of years. In all of the studies mentioned, the prepa- 

 ration of the material is done in the Museum laboratory. 



Dr. R. S. Bassler has also cooperated with the Survey in mapping 

 quadrangles in areas where his special knowledge of the rocks has 

 made this work advisable ; the Head Curator visited Florida in 

 1905 to investigate economic resources for the Survey, and Messrs. 

 Foshag and Shannon of the divisions of mineralogy and economic 

 geology are almost constantly in cooperation with this organization 

 in determinative and descriptive work. 



DEPARTMENT OF ANTHROPOLOGY 



Archeological Investigations in Guatemala. — In 1914, Mr. Neil M. 

 Judd was asked to participate in archeological investigations at Qui- 

 rigua, Guatemala, conducted under the direction of Dr. Edgar L. 

 Hewett. One of the objects of the expedition was the reproduction 

 in plaster of several of the huge stone monuments at Quirigua. This 

 work was assigned to Mr. Judd, who, with his assistants, completed 

 casts from six of the colossal stelae by the use of glue molds, a mate- 

 rial never before em.ployed for this purpose in the torrid zone. 



Archeological Investigations in New Mexico. — An important ex- 

 ploration was begun by the National Geographic Society in coopera- 

 tion with the Museum. The Society appropriates $75,000 for five 

 years' work in the ancient ruin of Pueblo Bonito, Chaco Canyon, 

 New Mexico, tmder the direction of Mr. Judd, the specimens secured 

 becoming the property of the Museum. This is the largest scheme of 

 cooperative work ever engaged in by the Department, and is looked 

 upon as opening up great possibilities for further exploitation by the 

 National Geographic Society. 



Anthropological Studies at the Panama- California Exposition. — 

 By arrangement between the Institution and the Panama-California 

 Exposition, Dr. Hrdlicka of the division of Physical Anthropology 



