. Breviora. ^^^'^^^'-^i^n^'.^. Ai^;d,^iS,:.».:.«^.m^S^. Fig. 1. Type specimen, x 34; the mucous pores somewhat exaggerated. Fig. 2. Ventral view of anterior part of type specimen, x }4', the mucous pores somewhat exaggerated. Fig. 3. Ventral view of gill region of specimen 505 mm. long; natural size; the mucous pores somewhat exaggerated. Fig. 4. Lingual teeth of specimen 505 mm. long, from the right-hand side; outer row above, inner row below, anterior ends to the left, x 2. Fig. 5. Side view of caudal region of specimen 338 mm. long, x J-^; the mucous pores slightly emphasized. Fig.

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. Breviora. ^^^'^^^'-^i^n^'.^. Ai^;d,^iS,:.».:.«^.m^S^. Fig. 1. Type specimen, x 34; the mucous pores somewhat exaggerated. Fig. 2. Ventral view of anterior part of type specimen, x }4', the mucous pores somewhat exaggerated. Fig. 3. Ventral view of gill region of specimen 505 mm. long; natural size; the mucous pores somewhat exaggerated. Fig. 4. Lingual teeth of specimen 505 mm. long, from the right-hand side; outer row above, inner row below, anterior ends to the left, x 2. Fig. 5. Side view of caudal region of specimen 338 mm. long, x J-^; the mucous pores slightly emphasized. Fig. 6. Side view of caudal region of P. atami, 500 mm. long, from Suruga Gulf, Japan, Nat. Mus.,No. 161442;the mucous pores slightly 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University

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