Relationship between the totall length of Squalus mitsukurii (Jordan & Snyder, 1903) (Fig. 2.) and the size of its teeth.was investigated. Nine sharks were collected from the waters around Japan, mainly from Tokyo Bay. The jaws were separated from each shark and two teeth were collected from the fifth file of each lower jaw (excluding shark m70), one on each side, and the average size of the four teeth was determined. (Fig. 3 and 4) The results of the measurements are shown in Fig. 1. The measurement result linear equation X = (Y-0.26)/0.042 was obtained.

Fig. 1. Relationship between the totall length of Squalus mitsukurii Jordan & Snyder, 1903 and the size of its teeth.

Fig.2. S. mitsukurii

Fig. 3. Dentition of S. mitsukurii

Fig. 4. All teeth used for measurements

ver.2.20241005, ver.1. 20101201

I. Squalus II. Apron III. Serrations .IV. Size

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