66 
PERCESOCES. 
British Museum from the West Indies and Venezuela. Of the marine genera Mugil, 
Querimana, and Chenomugil only a synopsis is given, but they are included because 
the species of the first-named, at least, ascend rivers for considerable distances. 
1. AGONOSTOMUS, Bennett, 1830. 
Agonostomus, Jord. & Everm. Bull, U.S. Nat. Mus. xlvii. 1896, p. 818. 
Neomugil, Vaill. Bull. Soc. Philom. iv. 1894, p. 72. 
Mouth subterminal, with lateral cleft; bands of small pointed teeth in the jaws and on the vomer and 
palatines; two anal spines. 
Hab. Tropical rivers near the sea, most of the species being American. 
Synopsis of the American Species. 
I. Maxillary not extending beyond the anterior 4 of eye (in the adult). 
A. Snout subconical, the upper lip only moderately thick, even in the 
adult 2... 1 eee ee eee eee ee ee OL. monticola. 
B. Snout truncated anteriorly, the upper lip thick. 
Pectoral from less than 2 (adult) to + (young) the length of head; rength of 
oO 
lower jaw 24 (adult) to 22 (young) in the length of head. . . . 2. nasutus. 
Pectoral 2 (adult) or 2 (young) the length of head; length of lower jaw 21 
o 
(adult) to 24 (young) in the length of head . . 2. 2... . e . . 8 salvini. 
II. Maxillary extending to below middle of eye (in the adult). 
A. Snout subconical, the upper lip only moderately thick, even in the . 
adult 2... 1 ee eee ee ee ee ee we we A percoides. 
B. Snout truncated anteriorly, the upper lip thick. 
Pectoral extending to the vertical from the origin of spinous dorsal (adult) 
or beyond (young) ; first dorsal spine as long as the longest rays of the 
second dorsal . .. .- ee eee el . 2 oe .) 6B macracanthus. 
Pectoral nearly reaching the ver tical from the origin of spinous dorsal i in the 
young, but not in the adult; first dorsal spine shorter than the longest 
rays of the second dorsal. . . «© 2 6 ee ee ee ee ee . «6 microps. 
1. Agonostomus monticola. 
Mugil monticola, Bancroft, Cuvier’s Animal Kingdom (ed. Griffiths), p. 367, t. 86 (1836) ’ 
Agonostoma monticola, Giinth. Cat. Fish. iii. p. 464 (1861) *. 
Agonostomus monticola, Jord. & Everm. Bull. U.S. Nat. Mus, xlvil. 1896, p. 819°, and 1900, 
fig. 847%. 
Depth of body 33 to 44 in the length, length of head 33 to 43. Snout from as long to 12 as long as eye, the 
diameter of which j is 35 to 54 in the length of head ; interorbital width 22 to 3 in the length of head. 
Snout subconical, the upper lip not very thick; mouth subterminal; maxillary extending to below 
anterior edge or anterior 4 of eye; about 20 gill-rakers on the lower part of the anterior arch. 38 to 
44 scales in a longitudinal series, 12 to 14 in a transverse series from spinous dorsal to vent, 20 to 22 
round the caudal peduncle. Dorsal IV, I 8; origin of spinous dorsal usually nearer to tip of snout than 
