504 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



XIX. GENYATREMUS. 



Genyatremus Gill, Proc. Ac. Nut. Sci. Pliila. 1862, 2;j() (cavifrons). 



Type: Dlagramma carifronsCnv. & Yiil. = Lutjanus liitens Bloch. 



Etymology: yivu:;, chin; a, privative; r/irj/jia^ aperture. 



Tills •i;enus contains a sinjjle American species, an Anlsotremus with- 

 out central pore at the cliin. From Flectorhi/ncJiKs, \t diilers mu(;li as 

 Anisotremus differs from Orthoprist'iH and romadasis. 



ANALYSIS OF SPKCIKS OV GENYATREMUS. 



a. Body ovate, compressed, the back inucli elevated, tlie depth a little less than half 

 body; auterior profile eveuly convex at nape, j^radually liecouiiug 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 ; snont 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 sorrje 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 subtruucate. Scales small, not parallel with the lateral line, 

 arranged oldiquely above and horizontally below, largest below the lateral 

 lino ; 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, 3j ; 

 depth, 2i; D. xiii, 12; A. in, 11; scales, 11-52-19 Luteus, 88. 



88. GENYATREMUS LUTEUS. 



LuiiaiiuH liiieu8 Bloch, Ichthyologia, taf. 247,1701 (Martinique, on a drawing by 



Plumier). 

 Gramminlen hcpalus Bloch & Schneider, Syst. Ichth., 1801, 187 (after lUoch). 

 J)i(i(jramma cavifrons Cuv. &- Val,, v, 1830, 290, pi. 123 (Rio .laneiro). 

 'i I'ristipoma scrntla Cuv. & Val., v, 272 (Martini(iue). 

 Wr'iHt'qwma auratum Cuv. &. Val., 1. c., 272 (M.artini([mO. 



Habitat: Lesser Antilles to Brazil. 



litymology: Luteus, yellow. 



This species seems to be not rare on the coast of lirazil and the 

 Lesser Antilles, probably on sandy coasts. It has not been found in 

 Cuba. There is not much doubt that the JAitianus luteus of r>lo(!h was 

 intended for tliis species, altliough in the drawing of IHumier, from 

 which it was taken, the tin rays are very inexactly indicated. 



