482 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
d. Scales comparatively large, less than nine in a vertical series between first 
dorsal spine and the lateral line; coloration olivaceous, the adult 
nearly plain, the young with two or more dusky lateral stripes 
which disappear with age; fins blackish. 
e. Seales 5, 6-52-15 (lateral line with 49 pores); scales above lateral line on 
anterior part of body more or less enlarged, especially in the adult; 
young specimens with two black horizontal stripes, one of these 
from eye to a point just before the base of caudal, where it is in- 
terrupted, a round black spot following at base of caudal; another 
stripe above this and parallel with it; scales of anterior part of 
back more or less distinctly marked with black spots, one on each 
scale, these spots not confluent. Body oblong-elliptical, the back 
elevated, the profile strongly convex at nape, becoming straighter 
anteriorly ; interorbital area a little more than eye; mouth short, 
the maxillary extending to anterior edge of eye; outside teeth of 
jaws conical, notably longer and stronger than the others; pre- 
opercle evenly serrate on vertical edge, weaker at angle; dorsal 
and anal spines strong, second anal stronger and a little longer 
than the highest dorsal spine, about half head; soft dorsal lower, 
about one-third head; pectoral falcate, as long as head; caudal 
forked. Head, 3; depth, 24; D. x11, 16; A. 10, 8 or 9; scales, 5 to 
6-52-12 to 15; eye, 4; snout, 22; second analspine, 14; fourth dorsal 
SPIN g25 PeCtOra | glass cee see See SURINAMENSIS, 54. 
ee. Scales 7, 8-46-15 (lateral line with 54 pores), scales above lateral line _ 
anteriorly not especially enlarged; all specimens examined with 
three or four black lateral stripes, one from eye to near base of 
caudal, where it ceases abruptly, giving place to a round caudal 
spot as in the young of A. surinamensis, also a stripe from scapular 
scale to last dorsal ray, forming two spots on back of caudal 
peduncle (this stripe wanting in 4. surinamensis); above this, one 
or two other stripes parallel with it; opercular membrane black. 
Anterior profile considerably steeper than in 4. surinamensis. In 
all other respects, in specimens of the same age, this species seems 
to agree with A. surinamensis. Head,3; depta, 2}; D. xu, 16; A. III, 
8; eye, 23; snout, 44; preorbital, 4; pectoral, 1....-. BICOLOR, 55. 
dd. Scales rather small, more than 9 in a vertical series between the first dorsal 
spine and the lateral line. 
f. Body not striped longitudinally with yellow or blue; preorbital nar- 
row; gill-rakers, x+-13. 
g. Anterior part of body without jet-black vertical bar; axil jet-black, 
the spot encroaching on base of pectoral; a round black spot 
on base of last rays of dorsal and anal; body dark gray, with 
obscure darker streaks; fins pale, edge of opercle dusky; pectoral 
long, 1;45 in head, reaching front of anal. Body ovate, the back 
elevated, the profile from the tip of the short blunt snout to the 
last dorsal ray evenly rounded; lower profile straighter, angulated 
at end of base of anal; mouth moderate; teeth in broad bands, 
the outer in both jaws longer, close-set, slender and sharp; pre- 
opercle rather finely and not sharply serrate; dorsal fin divided 
almost to base, the tenth spine no longer than first; second anal 
spine stronger and a little longer than third, lower than soft rays: 
caudal forked. Head, 3; depth, 2}; D. x1, 14; A. 11, 13; scales, 
9 or 10-51-x; eye, 4; snout, 4; preorbital=pupil: maxillary, 34; 
pectoral, i;); gill-rakers, x+-13 -.........--.--.. SCAPULARIS, 56. 
