north american beavers, otters and fishers. 139 



Explanation of Plates. 

 Plates XXI and XXII. 



(Scale slightly less than two-thirds natural size. ) 



Figs. 1 and 1. Castor canadensis pacificus Rhoads. Topotype ; No. 1865, col. of S. N. Rhoads ; old adult J\ from 

 Lake Kichelos, Kittitass county, Wash. Superior and inferior, vertical aspects of same skull. 



Figs. 2 and 2. Castor canadensis frondator Mearns. No. 32, col. of E. A. and O. Bangs ; young adult ?, from Red 

 Lodge, Mont. Superior and inferior, vertical aspects of same skull. 



Figs. 3 and 3. Castor canadensis Kuhl. No. 31, col. of E. A. and O. Bangs ; old adult (probably J 1 ), from New Bruns- 

 wick. Superior and inferior, vertical aspects of same skull. 



Plate XXIII. 



(Scale four-fifths natural size.) 



Figs. 1 and 2. Castor canadensis carolinensis Rhoads. Type ; No. Z. 609, col. of State Museum of N. Carolina ; old 

 adult $, from Dan river near Danbury, Stokes county, N. Carolina. Superior and inferior, vertical 

 aspects of same skull. 



Plate XXIV. 



(Scale six-sevenths natural size. ) 



Fig. 1. Lv.tra hudsonica ("Lacepede," Desmarest). No. 4188, col. of E. A. and 0. Bangs ; old adult (J 1 , from Canton. 

 Mass. Superior, vertical aspect of skull. 



Fig. 2. Lutra hudsonica ("Lacepede," Desmarest). No. 1201, col. of E. A. and O. BaDgs, old -adult c?, from "West- 

 ford, Mass. Inferior aspect of skull. 



Fig. 3. Lutra hudsonica pacifica. Rhoads. No. 8686, col. of Smithsonian Institution ; old adult, from (the coast of?) 

 Alaska. Inferior aspect of skull. 



Fig. 4. Lutra hudsonica iataxina (F. Cuvier). No. 3537, col. of E. A. and 0. Bangs ; old adult cj\ from Baleigb, N. 

 Carolina. Superior, vertical aspect of skull. 



Fig. 5. 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 XXV. 



(Scale slightly less than five-sixths natural size.) 



Fig. 1. Lutra hudsonica pacifica Rhoads. No. 8687, col. of Smithsonian Institution ; old adult (probably $}, from 



(the coast of ?) Alaska. Superior, vertical aspect of skull. 

 Fig. 2. Lutra hudsonica vaga Bangs. No. 1580, col. of S. N. Rhoads ; old adult J\ from Tarpon Springs, Fla. 



Superior, vertical aspect of skull. 

 Fig. 3. Lutra hudsonica pacifica, Rhoads. No. 303, col. of S. N. Rhoads; old adult $. from Tacoma, Wash. Superior. 



vertical aspect of skull. 



£frf3 I 



