History of North American pinnipeds, a monograph of the walruses, sea-lions, sea-bears and seals of North America . FIG. 14.—Odobazniis obesus. *l set or curvature of the tusks. The skulls, however, affordmany important differential characters, and on these differ- DIFFERENTIAL CHARACTERS. 157 ences I venture to predicate the existence of two species, usingthe term species in its commonly accepted sense. To showmore readily what these differences are, I present herewith aseries of figures of skulls of both old and young of the twoforms. The skulls selected for this purpose are average exam-ple
History of North American pinnipeds, a monograph of the walruses, sea-lions, sea-bears and seals of North America . FIG. 14.—Odobazniis obesus. *l set or curvature of the tusks. The skulls, however, affordmany important differential characters, and on these differ- DIFFERENTIAL CHARACTERS. 157 ences I venture to predicate the existence of two species, usingthe term species in its commonly accepted sense. To showmore readily what these differences are, I present herewith aseries of figures of skulls of both old and young of the twoforms. The skulls selected for this purpose are average exam-ples of a considerable series, the adult skulls being those ofmales of strictly comparable FIG. 15.—OdolxEnus rosmarus. The skulls of the two species seen in profile (Figs. 14 and 15)exhibit the following- differences: The first and most obvious 158 ODOB^NUS OBESUS PACIFIC WALRUS.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherwashingtongovtprin
