1870.] 



SENATE— No. 170. 



13 



mens of the Northern Sea Bear QOtaria Stelleri Auct.), and 

 skins and complete skeletons of two adult male specimens of 

 the Northern Pur Seal (^Callorhinus ursinus Gray), and also 

 skins and complete skeletons of two adult females, and skins 

 and skeletons of two four months old specimens of the same 

 species. The skins being in good condition for mounting were 

 immediately sent to Mr. S. Jillson to be stuffed. 



The extent of the collection of Mammals already gathered 

 may, in general terms, be thus stated. The skins alone, which 

 comprise less than one-fifth of the whole number of specimens, 

 represent about one-half of the described North American 

 species ; about one-third of the South American, European and 

 Australian ; one-tenth of the Asiatic, and one-half of the Afri- 

 can. In the alcoholic collection, which must number about 

 three thousand specimens, are represented all the leading 

 groups, besides many species of which the Museum has no dry 

 specimens. This evidently forms a satisfactory beginning, 

 when it is remembered that the increase of this department, as 

 of that of Ornithology, has not as yet received very special 

 attention. 



Below are enumerated the additions made to this department 

 since the last report. 



By Donation. 



Agassiz, Alexander. 3 boxes of stumps of trees felled by 

 beavers, and sticks from beaver-dams, from Calumet, Michigan. 



Agassiz, Professor Louis. 14 specimens, 4 species, in alcohol, 

 from Jamaica Plain. 



Allen, J. A. 1 JLepiis americanus^ in peculiar pelage, fresh, 

 from Massachusetts. 



Allen, J. A. and Rev. Thomas Makcy. {Florida Expedition^ 

 30 specimens, 10 species, skins ; 14 specimens, 6 species, in alcohol ; 

 24 specimens, 10 species, skulls and skeletons, from St. John's River, 

 Florida. 



Blake, James H. 1 Scotophilus noctivagans^ from Cambridge ; 



5 specimens of Hesperomys leucopus, from Provincetown ; 1 skele- 

 ton of Hyperaodon bide7is, from North Dennis. 



Bryant, Capt. Charles. 2 fresh skins and two complete skele- 

 tons of the Northern Sea Bear ( Otaria Stelleri) ; 6 fresh skins and 



6 complete skeletons of the Northern Fur Seal ( Callorhinus ur- 



