140 REPORT OF NATIONAL MUSEUM, 1887. 



specimens, and supplements the important accession given by him the 

 previous year. With these additions the collection of Trenton fossils 

 from Wisconsin is placed in a creditable condition. 



No. 18532, from A. 0. Benedict, Indianapolis, Indiana, is large and 

 contains many interesting and valuable specimens, as also No. 18543, 

 from John H. Lemon, New Albany, Indiana, and furnish corals which 

 were very much needed in the Museum series. 



No. 18642, collected by I. C. Eussell, of the U. S. Geological Survey, 

 although small, is of unusual interest; and Mr. Eussell has indicated 

 his intention of making a large addition to it during the ensuing field 

 season. 



No. 18991, collected and identified by N. H. Darton, of the U. S. Geo- 

 logical Survey, was received in good condition for exhibition and adds 

 material to a weak spot in the collections. 



Nos. 19043 and 19115, collected by myself, contain types of 26 new 

 species and give a good series of the faunas they represent. 



Altogether, 4,989 specimens were added during the year. 



The first four months of the year I was engaged in field-work in con- 

 nection with the Geological Survey. After returning in November and 

 moving into the new office and laboratory, work was begun by Mr. Gur- 

 ley on the accumulated accessions and pushed so vigorously that by 

 June 1 all the accessions, with the exception of those I wished to study 

 before identifying, were catalogued and the record numbers painted on 

 the specimens. A large amount of material in the general collection 

 was also cleaned, identified, and labeled. From the latter and other 

 accessions the exhibition series will be selected. 



From material collected by the U. S. Geological Survey not yet trans- 

 ferred to the Museum, and from material already in the Museum collec- 

 tions, I continued the study of the Cambrian faunas of North America. 

 A large number of drawings were prepared, and the preliminary study 

 of the Upper Cambrian fauna so far advanced that the work of another 

 year will get the larger portion of it in readiness for publication. 



A special study of the fauna of the Taconic rocks of New York was 

 completed and a paper thereon prepared for publication. The speci- 

 mens are recorded under accession number 19115. A paper was also 

 prepared on the "Taconic System" of Emmons and read before the 

 National Academy of Sciences April 22, 18S7. 



In my last report a summary was given of the material in the collec- 

 tion. To that must be added the accessions of the past year, 4,989 

 specimens. 



The catalogue numbers taken up during the year were from 15461 

 to 16000 and from 17001 to 17496. The break in the numbering, from 

 16000 to 17001, represents the one thousand numbers assigned to Prof. 

 Henry S. Williams, but not yet taken up. 



Additions have been made to the material selected for exhibition, 

 and by the time the exhibition cases are ready to receive the specimens 

 a very good representative collection can be displayed. Until after 



