REPORT OF DEPARTMENT OP MARINE INVERTEBRATES. 195 



as indicated in the table .yiven below. Each entry indicates a separate 

 package (jar, bottle, homeopathic vial, box, or tank), containinjj;' a sin- 

 gle species, altiioiigh the same species may be dni)licated several times 

 by beinjj represented by specimens from different localities. The en- 

 tries are not limited to identified specimens, bnt all collections are cat- 

 alo<;iied as soon as sorted, in order that an accurate account may be 

 kept of the vast accumulation of materials which now more than fill 

 the storage space allotted to them. A card catalogue is also ke])t, and 

 is intended to cover all the entries in the record books. In so far as 

 they refer to identified materials, the cards are arranged in systematic 

 order, permitting of easy reference to the species, while the remainder 

 are arranged serially as to the catalogue numbers, and constitute the 

 working catalogue, being more convenient for handling than the large 

 record books. 



Table shoioing entries in record books for 1834. 



DISTRIBUTION OF DUPLICATES AND EXCHANGES. 



A large number of duplicate specimens have been distributed during 

 the year, mainly to Institutions in the United States. In this manner 

 the ^Museum has been relieved of the care of much material of no 

 further use to its workers, and students elsewhere have been given the 

 benefit of its resources. Nearly all the collections sent out belonged to 

 the regular series of duplicates described in former reports and referred 

 to elsewhere in this report. These have been made up from dui)li- 

 cates resulting from the explorations of the U. S. Fish Commission, 

 and are collections of great value, a large share of the species they 

 contain being recent additions to science from deep water. As has 

 been the custom hitherto, no returns have been demanded from Ameri- 

 can institutions supplied with these sets, but collections have been sent 

 to foreign countries only in exchange. Forty-eight sets belonging to 

 the regular series were sent out in 1884 to the following institutions : 



London series, containing 225 species (sent in exchange) : University 

 of Edinburgh, l-'dinlxirgh, Scotland. 



Series II, containing about 1!)0 species each : State University, Bloom- 

 ington, Ind. ; liochester University, liochester, N. Y. ; Johns Hopkins 



