14 MCJSEUM OF COMPARATIVE ZOOLOGY. [Apr. 



si7uis) ; 1 fresh skin, a skull and a complete skeleton of the Walrus 

 (Trichechus rosmarus)^ from Alaska. 



Glex, Mrs. M. 1 Condylura cristata and 3 skins of Bats, from 

 Cambridge. 



Hayden, Dr. F. V. Box of skulls and other bones of Bos amer- 

 icanus^ fi-om the Laramie Plains. 



Hays, Dr. I. I. 1 skull and 2 complete skeletons of Seals, from 

 Greenland. 



LocKwooD, Sa:muel, Jr. 3 specimens, 3 species, from Fallsburg, 

 N. Y. ; 5 specimens, 1 species, from Cambridge. 



Martix, Stephen C. 1 skull of Mesoplodon sowerbyensis ; 15 

 specimens, 4 species, in alcohol, from IS'antucket. 



KcETTEE, Joseph. 1 Arvicola ri2mrius, from Cambridge. 



jBy Exchange. 

 Jakdin des Plantes. 6 specimens, 6 species, skins. 



Report on the Birds, by J. A. Allen. 



During the past year the arrangement of the ornithological 

 collection has considerably advanced. Some fifteen hundred 

 North American skins and mounted birds received at the close 

 of last year, and about nine hundred others received since, have 

 been entered upon the general catalogue, and the entire North 

 American collection of skins systematically arranged in the 

 bird room. The condition of the alcoholic collection has also 

 been thoroughly examined, and fresh alcohol added wherever 

 it was needed. The North American birds preserved in alcohol 

 have been entirely rearranged, the cataloguing completed and 

 the specimens removed from the kegs and barrels, in which up 

 to the present year they had been mainly stored, to glass bottles 

 and stone jars. This portion of the collection now numbers 

 above six thousand specimens, representing three hundred and 

 seventy- two species, any specimen of which is perfectly acces- 

 sible for examination. The South American collection is prob- 

 ably nearly as large, while there are also a large number of 

 specimens similarly preserved from Europe, the East Indies, 

 the Pacific Islands and Zanzibar. The whole number of birds 



