84 Miller — Synopsis of the Voles of the Genus Phenacomys. 



Measurenu'iitii. — Type spet'irnen " (from alcoholic before skinning) : total 

 length, 11(5; tail vertebrtw, 28; hind foot, 18" (Merriam) ; seven adults 

 from Peninsula Harbor, Ontario (north shore of Lake Superior), average: 

 total length, 134; tail vertebra-, 29. i) ; hind foot, 18.1; maximum: total 

 length, 1.50; tail vertebne, 38; hind foot, 19. 



General remarks. — Phenacomys latimunus is recognizable as a member of 

 the imgara group l)y its distinctly fulvous face. From P. loir/ava it differs 

 in its smaller size and smooth interorbital region. 



Phenacomys ungava Merriam.* 



Phenncomys oelatus Merriam, North American Fauna, No. 2, p. 33, October 

 30, 1889. Godbout, Province of Quebec, Canada (based on old skull, 

 with subquadrate interparietal). 



Plienacomys inu/ara. Merriam, North American Fauna, No. 2, p. 35, Octo- 

 ber 30, 1889. Fort Chimo, Ungava, Labrador (based on young adult 

 skull, with transversely lengthened interparietal). 



Type locality. — Fort Chimo, Ungava, Labrador. Type in Merriam col- 

 lection {(f adult, No. if If). 



Geographic didribution. — Labrador and eastern Quebec. Not known 

 from any point south of the lower edge of the Hudsonian zone. 



General characters. — Size large ; skull of adult with higli interorbital 

 ridges limiting a deep frontal sulcus; muzzle and face conspicuously 

 yellower than rest of head. 



Color. — Essentially as in P. latimunus; young darker and more plumbe- 

 ous, at first without the cinnamon of the adult; tail of young specimens 

 nearly uniform dusky, only slightly paler below. 



Skull. — The skulls of adult specimens vary in basilar length from 22 to 

 25 nun. and in zygomatic breadth from 14 to 16 mm. Rostrum rather 

 more heavily built than in /-*. latimanus and with profile usually less 

 deflected from dorsal outline of frontals ; interorbital region with two 

 strongly developed ridges, between which lies a conspicuous trough which 

 increases in depth and narrowness in old age 



Teeth. — Except for their larger size, the teeth of P. luigavct, do not differ 

 in anv constant character from those of P. laiinunms. The anterior loop 

 of the front lower molar is, however, less frequently cut by a deep re- 

 entrant angle on the inner side. 



Measurements. — Type of P. ungava " (from alcoholic specimen before 



*I am aware that in the original paper on the genus the specific name 

 ungava is printed two pages beyond the name celatax. To assume, how- 

 ever, that of alternative names the one which stands first in a book has 

 by virtue of mere position precedence over others is as unreasonable as to 

 assume that the first species mentioned under a composite genus should, 

 other things being equal, necessarily become the type. As priority dates 

 from publication, and publication is distribution, it is impossible for one 

 name to have priority over another issued with it; hence to displace the 

 name ungava as here used it will be necessary to show that the animal has 

 an older name, that is, one published prior to October 30, 1889. 



