32 ANNUAL REPORT OF THE 
REPORT ON THE CRUSTACEA AND MOLLUSCA. 

By WALTER Faxon. 

By exchange with the Imperial Academy of Sciences of St. 
Petersburg, a very valuable collection of Crayfishes has been 
obtained, a collection comprising all the species found in the river 
basins of Russia, Transcaucasia, Turkestan, Manchuria, and Korea. 
Mr. A. A. Packard has given to the Museum the microscopic sec- 
tions of Limulus eggs and Crustacea which served as the basis 
for several of the published memoirs of the late Dr. Packard. 
From Alex. E. Wight a small collection of the land Crustacea of 
the Bahamas has been purchased. The Museum owes thanks to 
Dr. R. T. Jackson for the gift of Estherias from DeWitt, Neb., to 
Messrs. G. M. Allen, Th. Barbour, and O. Bryant for Crustacea 
dredged off Abaco, Bahamas, in 3-15 fathoms, to Messrs. 8. Hen- 
shaw and A. Gulick for additions to the Department of Mollusca. 
The Macrura of the “ Blake” Expedition provisionally reported 
upon by the late Alphonse Milne Edwards (Bull. M. C. Z., Vol. — 
VII. No. 1, 1880; Ann. Sci. Nat., 1881) have again been sent to — 
Paris to be further elaborated by Milne Edwards’s collaborator, 
M. E. L. Bouvier. 
Dr. Harriet Richardson of Washington has critically revised our 
whole collection of North American Isopoda, now safely returned 
and catalogued. | 


