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form. In skull characters, M. c. raceyi differs little from cascadensis 
except in having wider jugals and generally broader nasals; from okanagana 
in having much narrower and more tapering zygomatic arches; and from 
oxytona in having broader jugals and with zygomatic arches considerably 
less bowed outwards (See Plate V). The specimens which are nearest 
geographically to the Chilcotin range are three from McGillivray creek, 
Lillooet district, and raceyi resembles these more closely than any other 
form, but the skull characters put the Lillooet specimens definitely with 
okanagana. There is probably intergradation between raceyi and okanagana 
in the intervening region, and possibly also with oxytona or caligata to 
the northward. ( See tables of skull measurements.) 1 
This subspecies is named in honour of Mr. Kenneth Racey of Van- 
couver, well known for his work as a field naturalist in western British 
Columbia, whose energy in carrying on an extended field exploration 
in the little-known Chilcotin region, resulted in collecting the type and 
other specimens of this new form. 
Specimens Examined. Eight from the type locality: three adult 
males, two half-grown males, one adult female, one subadult female, 
and one half-grown female, from collection of Kenneth Racey, Vancouver, 
British Columbia, taken August 13 to 16, 1931. 
‘Measurements of AT. e. nivaria taken from “Revision of the American Marmots'’; N. A. Fauna, No. 37, 
1915, p. 73. All other figures are from measurements made by the writer. 
