70 



NORTH AMERICAN FAUNA. 



[No. 37. 



SlcuU. — Similar to that of cascadensis but relatively narrower 

 across zygomata and broader between orbits and across rostrum; 

 postorbital constriction narrower; nasal branches of premaxillae 

 narrower than nasals at posterior end. 



Measurements, — Adult male:^ Total length, 720-750 (average, 

 740); tail vertebrae, 210-237 (219); hind foot, 100-110 (106). Adult 

 female: 2 670-690 (680); 180-192 (186); 91-100 (95.5). Shall: 

 Adult male: 3 Condylo-basal length, 105-109.8 (106.1); palatal 

 length, 60-63 (61.1); postpalatal length, 39.6-42 (40.6); length of 

 nasals, 40.6-46 (43.7); zygomatic breadth, 64.8-67.1 (65.6); breadth 

 across mastoids, 46.2-47.3 (47); least interorbital breadth, 27.5- 

 31.2 (29.8); breadth of rostrum, 24.5-27.7 (25.8); maxillary tooth 

 row, 21.5-24.2 (23.1). Adult female:^ Condylo-basal length, 99.5; 

 palatal length, 58; postpalatal length, 37.5; length of nasals, 41.5; 

 zygomatic breadth, 64.3; breadth across mastoids, 43.7; least inter- 

 orbital breadth, 26.5; breadth of rostrum, 24.6; maxillary tooth 

 row, 22.5. 



Remarks. — The Olympic marmot is one of the largest members of 

 the caligata group, about equahng in external measurements casca- 

 densis and oxytona. Its skiill averages about the size of that of 

 cascadensis, but the largest male skull of olympus is longer than anj' 

 other American marmot skull examined. In color the species is 

 decidedly browner than any of the forms of caligata, though not 

 nearly so brown as vancouverensis. The black colors of caligata have 

 almost entirely disappeared, but some of the white haixs remain. 



This species is confined to the high mountains of the Olympic 

 Peninsula and is geographically isolated from its nearest relative, 

 cascadensis. 



Specimens examined. — Total number, 17, as foUows: 



"Washington: Happy Lake, Olympic Mountains, 7; ^ Mount Ellinor, 3; Mount 

 Steel, 4; Soled uck River (near head), Olympic Mountains, 3. 



MARMOTA VANCOUVERENSIS Swarth. 



Vancouver Island Marmot. 



(PI. IX, fig. 3; PI. XV, fig. 20 



Marmota vancouverensis Swarth, Univ. of California Pub. Zool., VII, 1911, p. 201; 

 X, 1912, p. 89. 



Type locality. — Mount Douglas, Vancouver Island, British Colum- 

 bia (altitude, 4,200 feet). 



1 Three specimens from Olympic Mountains, Wash. 



2 Two specimens from same locality. 



3 Five specimens from same locality. 

 * One specimen from same locality. 



6 Collection Field Mus. Nat. Hist. 



