258 Frerp Museum or Naturat History — Zoézoey, Vor. XI. 
casins, etc. They were split and dyed a variety of colors with roots, 
barks and berries, some of these garments, especially those worn by 
chiefs, having been very elaborate and highly prized. 
Albinistic examples of this animal are occasionally taken. There 
is an entirely white specimen in the Field Museum collection. 
Specimens examined from Wisconsin: 
Sayner, 2; Rummeles (skull), 1; (S. C.) Marshfield, Wood Co., 1; 
Clark Co., 1; (O.) Woodruff, Vilas Co., 2; Oconto Co., 1=8. 
tM 
Erethizon dorsatum 
Area E intergradation 
Map illustrating approximate range of the Canada Porcupine (Erethizon dorsatum) in eastern 
nited States and Canada. 
Suborder DUPLICIDENTATA. 
This suborder comprises two families, the Leporide or true Hares 
and Rabbits; and the Ochotonide containing Picas or Tailless Hares 
sometimes called Chief Hares — small animals inhabiting mountain 
regions, several species of which occur in western North America but 
not within our limits. The members of the suborder are characterized 
by having two pairs of permanent upper incisors,* the inner ones very 
small and placed directly behind the others; the enamel of the incisors 
is continuous and not confined to the front of the teeth; the tibia and 
fibula are united, being anchylosed below; clavicles are present (com- 
plete in Ochotonide but incomplete in Leporide); incisive foramina 
of the palate large and usually confluent; bony palate short, being 
reduced to a narrow bridge between the premolars; postorbital proc- 
esses very large in Leporide but absent in Ochotonide; testes external. 
* At birth there are three pairs but the outer one on each side is soon lost. 
