504 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
XIX. GENYATREMUS. 
Genyatremus Gill, Proc. Ac. Nat. Sci. Phila. 1862, 256 (cavifrons). 
Type: Diagramma cavifrons Cuyv. & Val.=Lutjanus luteus Bloch. 
Ktymology: yévus, chin; a, privative; tpjzua, aperture. 
This genus contains a single American species, an Anisotremus with- 
out central pore at the chin. From Plectorhynchus, it differs much as 
Anisotremus differs from Orthopristis and Pomadasis, 
- ANALYSIS OF SPECIES OF GENYATREMUS. 
a. Body ovate, compressed, the back much elevated, the depth a little less than half 
body; anterior profile evenly convex at nape, gradually becoming concave to 
front of eye, where it rapidly descends straightish to point of snout; interorbital 
area flat, about equal to eye; occipital crest arising opposite middle of pupil, 
its base rising on the highly arched frontals considerably above top of the low 
temporal crest. Head small; snout blunt and short; mouth moderate, the max- 
illary reaching past anterior edge of orbit; anterior nostril oblong, much 
larger than posterior; preorbital very narrow, about one-fourth as wide as eye; 
eye large, 3 in head; preopercle strongly serrate on angle, the serre gradually 
becoming weaker on both limbs; gill-rakers weak, about 7 below angle, besides 
rudiments. Dorsal fin high, the fifth spine longest, the last spine slightly longer 
than the preceding one and about two-thirds as long as the first ray; anal fin 
lower than soft dorsal, the second spine longer and stronger than third; pecto- 
rals short; caudal subtruncate. Scales small, not parallel with the lateral line, 
arranged obliquely above and horizontally below, largest below the lateral 
line; vertical fins scaleless; scapular scale very evident, about three times as 
long as broad; lateral line not following outline of back, wavy below the soft 
dorsal. Color in spirits uniform golden, with numerous longitudinal stripes of 
a brighter color following the rows of scales below the lateral line. Head, 3}; 
depth, 24; D. x1, 12; A. 1m, 11; scales, 11-52-19. ............-....- LUTEUS, 88, 
88. GENYATREMUS LUTEUS. 
Lutianus luteus Bloch, Ichthyologia, taf. 247,1791 (Martinique, on a drawing by 
Plumier). 
Grammistes hepatus Bloch & Schneider, Syst. Ichth., 1801, 187 (after Bloch). 
Diagramma cavifrons Cuy. & Val., Vv, 1830, 290, pl. 123 (Rio Janeiro). 
?Pristipoma serrula Cuy. & Val., Vv, 272 (Martinique). 
?Pristipoma auratum Cuy. & Val., 1. ¢., 272 (Martinique). 
Habitat: Lesser Antilles to Brazil. 
Ktymology: Luteus, yellow. 
This species seems to be not rare on the coast of Brazil and the 
Lesser Antilles, probably on sandy coasts. It has not been found in 
Cuba. There is not much doubt that the Lutianus luteus of Bloch was 
intended for this species, although in the drawing of Plumier, from 
which it was taken, the fin rays are very inexactly indicated, 
