. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. â ââ â â â ,,"â¢" 'â â -â - â â â â¢^~â¢-â â -â â .^â â â '=^37;i?M9t15^;s<MSsass^ Figure 38. Tetragonurus cuvieri, drawing of a 129-mm specimen, from Grey, 2 cm one short spine preceding the rays. Anterior rays the longest, those that follow decreas- ing slightly in length, 9 to 15 finrays in all. Pectoral tin small, the central rays the long- est. Pelvic fins small, inserting behind pec- toral fin base and before origin of first dor- sal, innermost ray attached to abdomen for its entire length. C
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. â ââ â â â ,,"â¢" 'â â -â - â â â â¢^~â¢-â â -â â .^â â â '=^37;i?M9t15^;s<MSsass^ Figure 38. Tetragonurus cuvieri, drawing of a 129-mm specimen, from Grey, 2 cm one short spine preceding the rays. Anterior rays the longest, those that follow decreas- ing slightly in length, 9 to 15 finrays in all. Pectoral tin small, the central rays the long- est. Pelvic fins small, inserting behind pec- toral fin base and before origin of first dor- sal, innermost ray attached to abdomen for its entire length. Caudal fin forked. Scales moderate in size, with heavy longitudinal keels, very adherent, following a geodesic pattern around the body. Very small scales on bases of median fins. Lateral line usu- ally slightly arched anteriorly, descending to run along mid-lateral line of body and ending on peduncle at origin of keels; no tubed scales. Skin thick; sulidennal canals cannot be traced. Pores to surface minute. Head 30 to 20 per cent of the standard length. Top of head and snout naked, small pores in naked skin. Scales extending for- ward over nape almost to level of posterior border of the eye. Eye large, with a series of grooves on the posterior rim. Nostrils toward top of blunt snout, large, well sepa- rated, the anterior round, the posterior a slit. Maxillary ending under eye, angle of gape well before eye. Premaxillary not pro- tractile. Lacrimal bone covering most of upper jaw at all times, ventral border of maxillary remaining exposed. Lower jaw almost completely within upper jaw when mouth is closed. Supramaxillary absent. Teeth in upper jaw small, pointed, recurved, spaced. Teeth in lower jaw large, knifelike, close set, with small cusps, deeply em- bedded in the gum with only the tips show- ing. Strong recurved teeth present on head of vomer, and in a single series on shaft of vomer and palatines. Small teeth on basi- branchials and, usually, prof
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
