. The Canadian field-naturalist. 226 The Canadian Field-Naturalist Vol. 97. Z2^ SCIENTIFIC CORPORATION 60 ARSENAL WATERTOWI Figure 2. Left maxillary tooth row of the river otter, YPM 4405. The first tooth on the maxilla is the canine: C. There are four premolars: P1-P4. Ihere is but one upper molar present in the family M ustelidae: M. Godin (1977, p. 234) says males grow larger than females and may attain 130 cm. He gives tail and hind foot maxima as 50 cm and 15 cm, respectively. These measurements seem suspiciously round and even; I do not believe they were taken from an actual specime
. The Canadian field-naturalist. 226 The Canadian Field-Naturalist Vol. 97. Z2^ SCIENTIFIC CORPORATION 60 ARSENAL WATERTOWI Figure 2. Left maxillary tooth row of the river otter, YPM 4405. The first tooth on the maxilla is the canine: C. There are four premolars: P1-P4. Ihere is but one upper molar present in the family M ustelidae: M. Godin (1977, p. 234) says males grow larger than females and may attain 130 cm. He gives tail and hind foot maxima as 50 cm and 15 cm, respectively. These measurements seem suspiciously round and even; I do not believe they were taken from an actual specimen. Similarly, Waters and Rivard (1962) say no more about the size of otters than they attain "three feet or more," and have a maximum tail length of "fifteen inches" (p. 105). The photographs of YPM 4405 were made by Con- stance A. Rinaldo. The specimen was salvaged on Massachusetts permit 475, held by Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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