NORTH AMERICAN BEAVERS, OTTERS AND FISHERS. 
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EXPLANATION OF PLATES. 
Plates XXTI and XXII. 
(Seale slightly less than two-thirds natural size. ) 
Figs. land 1. Castor canadensis pacificus Rhoads. Topotype ; No. 1865, col. of S. N. Rhoads; old adult ot’, from 
Lake Kichelos, Kittitass county, Wash. Superior and inferior, vertical aspects of same skull. 
Figs. 2and 2. Castor canadensis frondator Mearns. No. 32, col. of E. A. and O. Bangs ; young adult 9, from Red 
Lodge, Mont. Superior and inferior, vertical aspects of same skull. 
Figs. 3and 3. Castor canadensis Kuhl. No. 31, col. of E. A. and O. Bangs ; old adult (probably 3’), from New Bruns- 
wick. Superior and inferior, vertical aspects of same skull. 
Plate X_XTIT. 
(Seale four-fifths natural size. ) 
Figs. land 2. Castor canadensis carolinensis Rhoads. Type; No. Z. 609, col. of State Museum of N. Carolina; old 
on 
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adult <j, from Dan river near Danbury, Stokes county, N. Carolina. Superior and inferior, vertical 
aspects of same skull. 
Plate XXIV. 
(Seale six-sevenths natural size. ) 
-Lutra hudsonica (‘‘ Lacépede,’’? Desmarest). No. 4188, col. of E. A. and O. Bangs ; old adult <j, from Canton, 
Mass. Superior, vertical aspect of skull. 
Lutra hudsonica (‘‘ Lacépeéde,”? Desmarest). No. 1201, col. of E. A. and O. Bangs, old adult 3, from West- 
ford, Mass. Inferior aspect of skull. 
Lutra hudsonica pacifica Rhoads. No. 8686, col. of Smithsonian Institution ; old adult, from (the coast of ?) 
Alaska. Inferior aspect of skull. 
Lutra hudsonica lataxina (F. Cuvier). No. 3537, col. of E. A. and O. Bangs ; old adult <j\, from Raleigh, N. 
Carolina. Superior, vertical aspect of skull. 
Lutra degener Bangs. Type; No. 6965, col. of E. A. and O. Bangs ; adult <j', from Bay St. George, Newfound- 
land. Superior, vertical aspect of skull. 
Plate XX V. 
(Seale slightly less than five-sixths natural size.) 
Lutra hudsonica pacifica Rhoads. No. 8687, col. of Smithsonian Institution ; old adult (probably ©’), from 
(the coast of ?) Alaska. Superior, vertical aspect of skull. 
Lutra hudsonica vaga Bangs. No. 1580, col. of S. N. Rhoads; old adult <j’, from Tarpon Springs, Fla. 
Superior, vertical aspect of skull. 
LIutra hudsonica pacifica Rhoads. No. 303, col. of S. N. Rhoads ; old adult 9, from Tacoma, Wash. Superior, 
vertical aspect of skull. 
