Body elongately ellipsoid, well compressed; least depth 
of caudal peduncle 1% its length or 3% in total head length. 
Head width 1 7/8 its length, Snout broadly convex, length 
3/5 its width. Eye midway in head, Maxillary to pupil, 
expansion half of eye. Teeth small, coni¢e, in narrow bands 
in jaws , in vomer and front of palatines, none on tongue. 
Hind nostril long vertical slit, length 3 in eye; front nos- 
tril at first third in snout. Preopercle edge entirely den- 
ticulate; strong flat spine at angle, its edge also denticulate. 
takers 7f-23, lanceolate; of in eye; filaments about 2/3 
of rakers. scales firmly adherent; 5 basal lobes; circull 
about 50 to 52; widékry obtuse subapical asperous triangular 
area; 16 rows of cheek scales. Sixth dorsal spine 24 in head; 
second anal spine 2 2/3; pectoral 2; ventral 11/6. 4n alcohol 
dull uniform dull brownish. +nner ventral rays deeper brown. 
Iris dull yellowish. Length 163 mm, (caudal damaged). Rio 
Janeiro. 
Compared with an example in the Academy, 207 mm, long, 
from same locality which differs in D. rays 14; A. rays 17 
(several abnormal); scales about 114 in lateral line to cau- 
dal base and 9 more on latter; 79 tubes iniiateral line to 
caudal base and 4 more on latter; 19 scales above lateral line 
to spinous dorsal origin; 35 scales below lateral line to anal 
origin; eye slightly larger; scales with 3 or 4 basal lobes; 
