330 Fretp Museum or Natura History — Zoéroecy, Vor. XI. 
Subfamily LUTRIN/A. Otters. 
Otters are semi-aquatic,* fish-eating mammals which are much 
hunted on account of the fine quality of their fur. There are at least 
two genera and a number of species distributed throughout many parts 
of the world, including several Neotropical forms. Of the eight rec- 
ognized species and subspecies in North America, one species and 
perhaps one subspecies are found within our limits. They are generally 
taken in traps, although Otter hunting with dogs trained for the purpose 
was formerly a common sport in England. 
Genus LUTRA Brisson. 
Luira Brisson, Regn. Anim., 2nd ed., 1762, p. 201. Type Mustela 
luira Linn. 
Body long; legs short; toes webbed; soles of feet hairy; tail long and 
rounded, thick at base and tapering; head broad; skull flattened; rostrum 
short; audital bullae much flattened; upper carnassial with tricuspid 
blade and a large inner lobe; upper molar large, first upper premolar 
very small; general color brown. (For cut of skull see p. 276.) 
Dental formula: I. a8 C222) Pm, Me, t= 36, 
ae a a! ate, ate 
Lutra canadensis (SCHREBER). 
OTTER. CANADA OTTER. 
Mustela lutra canadensis SCHREBER, Saugthiere, 1776, pl. CXXVI B. 
Lutra Canadensis Lapuam, Trans. Wis. State Agr. Soc., II, 1852 (1853), p. 339 
(Wisconsin). KEwnwnicoTt, Trans. Ill. State Agr. Soc., I, 1853-54 (1855), p. 578 
(Cook Co., Illinois). THomas, Trans. Ill. State Agr. Soc., IV, 1859-60 (1861), 
p- 655 (Illinois). 
Lutra canadensis KENNIcOTT, Agr. Rept. for 1858, U. S. Patent Office Rept., 1859, 
p. 246 (Illinois). Muves, Rept. Geol. Surv. Mich., I, 1860 (1861), p. 220 (Mich- 
igan). ALLEN, Proc. Bost. Soc. Nat. Hist., XIII, 1869 (1871), p. 183 (Iowa). 
StronG, Geol. Wis., Surv. 1873-79, I, 1883, p. 437 (Wisconsin). HERRICK, 
Geol. & Nat. Hist. Surv. Minn., Bull. No. 7, 1892, p. 129 (Minnesota). SNYDER, 
Bull. Wis. Nat. Hist. Soc., II, 1902, p. 122 (Wisconsin). Haun, Proc. U. S. 
Nat. Mus., XXXII, 1907, p. 463 (N. W. Indiana). Jackson, Bull. Wis. Nat. 
Hist. Soc., VI, 1908, p. 27 (Wisconsin). Jb., VIII, 1910, p. 89 (Wisconsin). 
Woop, Bull. Ill. State Lab. Nat. Hist., VIII, 1910, p. 581 (Illinois). 
Lutra hudsonica EVERMANN & But Ler, Proc. Ind. Acad. Sci., 1893 (1894), p. 138 
(Indiana). 
_.* The Sea Otter (L. lutris) passes so much of its life in the water that it can 
fairly be called aquatic. 
