50 



ANNUAL KEPORT OF THE 



REPORT ON THE CRUSTACEA AND MOLLUSCA. 



By Walter Faxon. 



A valuable lot of fresh-water Crustacea from Arkansas, Texas, 

 and the Indian Territory has been given to the Museum by Profes- 

 sor S. E. Meek. Acknowledgments of gifts of specimens are also 

 due to Mr. Ralph Hoffmann and to Professor I). W. Thompson, of 

 University College, Dundee. Other important accessions are the 

 result of exchanges carried on with the United States National 

 Museum. 



The Stalk-eyed Crustacea of the " Albatross " Expedition of 

 1891 have been divided between this Museum and the National 

 Museum. A first set, comprising types of all the species, has 

 been retained for our Museum, while the rest, including the larger 

 part of the duplicates, have been sent to Washington. The large 

 collections of Crayfishes that have accumulated in this Museum 

 as well as in the National Museum during the last six years have 

 been worked up by me, and the results embodied in a paper 

 illustrated by nine plates, to be published in the Proceedings of 

 the National Museum. A considerable collection of deep-sea 

 Crustacea obtained by the " Blake" in 1877-79 — composed in 

 part of duplicates reserved when the bulk of the collection was 

 sent to Professor Alphonse Milne Edwards, in Paris, in part of 

 specimens returned by him unused — has also been determined 

 and catalogued. This collection revealed several new and inter- 

 esting forms of deep-sea Crustacea, and added something to our 

 knowledge of the distribution of many species already known. 



I am happy to report that all of the deep-sea Crustacea in this 

 Museum, the rich booty secured during the cruises of the " Bibb," 

 " Hassler," " Blake," and " Albatross," are now — with the ex- 

 ception of the " Albatross " Cirripeds and Isopods, which are still 

 in the hands of Dr. Hansen, of Copenhagen — identified and 

 catalogued, and thus made available to workers in this important 

 field. 



Among the more valuable gifts to the department of Mollusca 



