. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Marine Hatchetfishes • Baud 89. igure 66. Po/yipnus sp/nosus; modified from Gijnther, 1887. (p. (S6); differs from P. spinosus in its onger basal post-temporal spines; shorter oreopercle spine; more raised first supra- ibdominal photophore, somewhat shorter 30st-temporal spine in relation to its base- :o-dorsal spine length, and higher gill •aker count. Description. D. 13-14; A. 15-17; P. 13- L5; total gill rakers (23) 24-28; vertebrae 33-34. Medium to large species, seldom ex- ceeding 70 mm SL; trunk broadly tapering
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Marine Hatchetfishes • Baud 89. igure 66. Po/yipnus sp/nosus; modified from Gijnther, 1887. (p. (S6); differs from P. spinosus in its onger basal post-temporal spines; shorter oreopercle spine; more raised first supra- ibdominal photophore, somewhat shorter 30st-temporal spine in relation to its base- :o-dorsal spine length, and higher gill •aker count. Description. D. 13-14; A. 15-17; P. 13- L5; total gill rakers (23) 24-28; vertebrae 33-34. Medium to large species, seldom ex- ceeding 70 mm SL; trunk broadly tapering; :audal peduncle broad, its depth more :han length of subcaudal photophore group; [lost-temporal spine spinose dorsally, its length substantially less than one-half dis- tance from its base to point of dorsal spine; third basal post-temporal spine long, sec- ond basal spine prominent; dorsal spipe bigh, with flangelike anterior portion not rising sharply from dorsal surface; supra- ibdominal photophores positioned in a itep-wise arrangement, \\'ith first photo- phore raised above other two; abdominal keel scales very spinose, including those ventral to preanal photophores; subcaudal scales either smooth or with single short spine; jaws medium; gill rakers long; pre- opercle spine curves slightly anteriorly; pigment in preservative dark dorsally with very narrow bar extending toward midline; pigment diffuse on trunk. Distribution (Fig. 63). Known only from the waters around Japan, where it has been taken less abundantly than P. tridentifer. Polyipnus spinosus GUnther Figure 66 Polyipnus spinosus Giinther, 1887: 170 (holotype BMNH, East Indies; not seisn); Alcock, 1896: 331; 1899: 135; Brauer, 1906: 69 (larvae, fig.) (in part); 1908: 175 (eye muscles); Roxas, 1934: 287; Misra, 1952: 367; Koumans, 1953: 186 (?); Samuel, 1963: 101 (?). Polyipnus spinosus spinosus Schultz, 1961: 624; 1964: 247. Species distinction. See P. tridentifer (p. S6) and P. sterope (p. 88). Description.
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