A New Subspecies of Porcupine II 
Fork, October 6 and 7, 1856, W. S. Wood, U. S. N. M., 1896- 
2594 and 1897-2595) from their large size (1896, length 812, 
tail 162; 1897, length 819, tail 212) and the posteriorly much 
narrowed nasal bones undoubtedly belong to bruneri.® The 
three skulls from Wyoming measured by Allen (F. V. Hayden; 
U. S. N. M., 3657, 6863 and 11564) are large, and this, with the 
dimensions of the nasals, indicates that these are also brunert. 
The two adult @ skulls from Three Buttes, Montana, measured 
Di NlctnCAUstst T andi3i, 1673, -Coues; U.S. N. MM. 12077 
and 13978) are proportioned essentially like the Wyoming speci- 
mens ; however, the Montana specimen figured by Baird as repre- 
sentative of epixanthum (Fort Union, U.S. N. M., 822; Mamm. 
N. A., p. 571 and pl. LV) is not only small, being probably imma- 
ture, but has the nasals nearly as wide posteriorly as anteriorly 
and is possibly an intergrading specimen with EF. e. epixanthum. 
The Idaho and Utah skulls (U. S. N. M., 12405 and 3680, re- 
spectively) are apparently also intergrades with E. e. epixanthum. 
The skulls of E. e. myops are smaller and have the nasals formed 
as in E. e. epixanthum. ‘The following table has been compiled 
in millimeters from Allen’s measurements, and is appended for 
comparison, 
The writer takes pleasure in naming this new subspecies for 
Professor Lawrence Bruner, of the University of Nebraska, in 
recognition of his pioneer work upon the fauna of Nebraska and 
his continued enthusiasm toward the furthering of our knowledge 
concerning it. The writer also wishes at this time to acknowledge 
his obligation to Dr. Joseph Grinnell, of the Museum of Verte- 
brate Zoology, University of California, for the loan of Cali- 
fornia specimens of E. e. epixanthum for comparison, and for 
permission to publish photographs of these specimens along with 
the Nebraska form, and to the authorities of the Field Museum of 
Natural History for the loan of material representative of E. d. 
dorsatum. 
15 Measurements taken from those given by Baird, Mammals of N. A., 
p. 571, and Allen, Monog. N. A. Rodentia, p. 395. 
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