XII (B).-DEPARTMENT OF LNVERTEBRATE FOSSILS, MESOZOIC 



AND CENOZOIC. 



By C. A. White, Honorary Curator. 



This report necessarily embraces an account of a large part of the 

 work which has been done by my division of the U. S. Geological Sur- 

 vey, because myself and all of my assistants except one are regularly 

 employed as members of that organization ; also much the greater part 

 of the material which is now being received for this division of the 

 Museum comes from parties connected with the Survey. 



Besides myself, the following persons connected with the Survey have 

 been employed in my division of the Museum work during the year : J. 

 B. Marcou, Lawrence C. Johnson, Frank Burns, P. C. George, J. P. 

 Hendley, and C. B. Boyle. In addition to these, Dr. E. IT. Singleton 

 has been detailed from the Museum for work in connection with the 

 registers and catalogues. It will of course be understood that for a 

 part of the year the persons mentioned above who are connected with 

 the Survey are not engaged upon Museum work. All of them spend 

 more or less of the year in the field work of the Survey, and some of 

 them are engaged mainly in the collection of fossils, which are sent to 

 the Museum. 



ACCESSIONS. 



There have been received at the Museum during the past year about 

 85 boxes of fossils which pertain to my division, the number being 

 somewhat indefinite because many of the boxes which are sent contain 

 material which pertains to other divisions. These accessions embrace 

 collections made in California, Oregon, 2^ew Jersey, Florida, Alabama, 

 and Mississippi. 



As is usually the case with such collectinns, a part of the material is 

 not available for Museum purposes; but still these accessions are mak- 

 ing large additions to the Museum material of a very important char- 

 acter. These new collections also embrace species which have not before 

 been in the possession of the Museum. This is especially the case with 

 the collections from California and tlie Gulf States. 



Fifteen accessions sent by private parties to the Museum have been 

 received by my division during the year. Most of these are of little value 



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