114 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
visible in each jaw; scales large, about 21 between tip of snout and origin of dorsal fin; soft dorsal, 
anal, and caudal densely covered with fine scales; soft dorsal and anal concave; pectoral not reaching 
origin of dorsal; caudal broad, widely forked; caudal peduncle deep but thin. 
Color, dusky-olive above with some bluish reflections, silvery below; no dusky streaks along 
rows of scales; a dark blotch on base of pectoral; dorsals and caudal pale, the former with very small 
dark punctulations; caudal margined with dark; anal and ventrals yellowish; pectoral pale, finely 
punctulate with brown. 
This species reaches a length of 6 to 10 inches. It is found from Florida Keys to Brazil, and is 
abundant about Key West, but not about Cuba, and does not seem to be common about Porto Rico, 
the collection containing a single small specimen obtained at Puerto Real. 
Mugil trichodon Poey, Ann. Lyc. Nat. Hist. N. Y., XI, 1875, 66, pi. 8, figs. 4 to 8, Cuba; Jordan & Evermann, 1. c., 816, 1896 
Genus 45. AG0N0ST0MUS Bennett. The Dajaos. 
Fresh-water mullets, with cleft of mouth extending laterally about to front of eye. Small teeth 
in vi Hiform bands in both jaws, and sometimes on vomer. Edge of lower lip rounded, not sharp. 
Stomach not gizzard-like. Anal spines usually 2, first soft ray slender and often taken for a spine. 
This genus occurs in streams of mountainous regions in tropical countries. The American species 
constitute the subgenus Dajaus, characterized by the presence of teeth on the palatines. 
a. Interorbital space flat, narrow, 4 in head; head 3.60; depth 4.33 to 4.50; lips thin; scales 40 to 42,-13 percoides 
an. Interorbital space convex, broad, 2.66 to 3 in head. 
b. Lips thin; body rather deep; maxillary to front of eye ' mnnticola, G9 
bb. Lips thick. 
c. Maxillary short, barely reaching front of eye, 4 in head; eye 5 in head; head 4.25 in length natnUus 
cc. Maxillary long, reaching posterior margin of pupil, 2.5 in head; eye very small, 6.5 in head; head 3.5 in 
length microps 
Fig. 25 . — Agonostumus niunticola. 
69. Agonostomus monticola (Bancroft). “ Dajnn.” 
Head 3.5; depth 3.8; eye <>; snout 3.4; maxillary 3; mandible 2.4; interorbital 2.9; D. iv-i, 8; A. 
hi, 9; pectoral 1.7; ventral 1.9; caudal 1.2; scales 42,-13. 
Body elongate and compressed; back scarcely elevated; head very broad above and slightly 
convex; mouth moderate, upper lip broadened in front, maxillary reaching front of eye, lower jaw 
included; villiform teeth on each jaw, vomer, and palatines; eye much nearer tip of* snout than edge 
of operele; scales large, slightly ctenoid; dorsal fin as in Mugil, spinous dorsal with an appendage of 2 
modified scales on each side of its base anteriorly; caudal large, moderately forked. 
Color in life; Brownish above, scales very dark-edged on upper three-fifths of side; lower parts 
white; top of head dark, cheek and opercles white, with brassy shades; under part of head white; 
axil black; a black blotch at base of caudal, becoming faint or disappearing with age; dorsal spines 
dark; soft dors x-. brassy at base, pale at tip; pectoral and ventral pale; anal yellowish, pale at tip, a 
black olotch near posterior border; caudal darker, yellowish at base; peritoneum black. In spirits 
not much different. 
