118 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Dbntex sp. 



Dentex rivulatus (not Ruppell, 1835) Bennett, Proc. Zool. Soc. London, pt. 3, 

 1835, p. 91 (Trebizond, Black Sea). 



Oblong oval. Head moderate. Eye large. Four canines in front 

 of each jaw. D. XI, 11; A. Ill, 9; P. 15. Above golden. Blackish 

 spots along lateral line. Silvery flexuoiis lateral bands. Length 103 

 mm. 



Differs from Dentex macrophthalmus in the more elongate body, 

 head tumid, eye smaller, pectoral more elongately subrounded, and 

 caudal greatly forked. Color like Scolopsides cancellatus. 



ANALYSIS OF SPECIES 



a'. Dentex. Frontal scales not extending forward before eye. 



6'. Scales above lateral line distinctly smaller than those below lateral line or 

 on flanks. 



c'. Dorsal spines 11; 17 or 18 rows of scales on cheek rupestria. 



c^. Dorsal spines 12; 11 or 12 rows of scales on cheek praeorbitalis. 



6^. Scales more or less uniform. 



d^. Taius. Spinous dorsal, caudal and ventral without filaments. 

 eK Dorsal spines graduated, moderate or subequal. 

 /'. Cheek with preopercle flange scaled, at least with age and at least 

 7 or 8 scales above preopercle ridge. 

 g^. Body depth equals head; silvery rose or pink and 4 to 6 bright 



silvery longitudinal bands, fins rosy argyrozona. 



g^. Body depth greater than head. 



h^. Six rows of dark dots linecpunctatus. 



h^. Four to 6 wavy blue, or dark, bands along sides and black 



blotch below sixth dorsal spine undulosus. 



h^. Reddish, with golden sheen tumifrons. 



p. Cheek with but 5 rows of scales above preopercle ridge. 



i^. Preopercle flange with 3 rows of scales; pink above, washed 

 with gold, below silvery and upper fins yellow. 



spariforniis. 

 i^. Preopercle flange naked. 



j^. Uniform rosy, hind caudal edge dark peronii. 



j^. Body uniform, bases of membranes of dorsals and anals 

 each with small dark spot and each fin with dark sub- 

 marginal line matsubarae. 



e^. Some dorsal spines elongate or filamentous. 



A;'. Third to fifth dorsal spines elongate; silvery pink, 

 with 4 or 5 bluish longitudinal stripes; 4 dark cross 



bands in young filosus. 



k^. Second dorsal spine alone elongate; silvery with rosy 



sheen nuf ar. 



(P. Nemipterus. First dorsal spine, upper caudal lobe and first ventral 

 ray end in long filaments; 5 rows of scales on cheek above preopercle 



ridge filamentosus . 



a^. Polysteganus. Frontal scales extend before eyes above nostrils; upper half 

 of body with longitudinal rows of blue dots coeruleopunctatus. 



