66 PEECESOCES. 



British Museum from the West Indies and Venezuela. Of the marine genera Mugil, 

 Querimana, and Chcenomngil 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. & Evcrm. Bull. U.S. Nat. Mus. xlvii. 189G, p. 818. 

 Neomugil, Vaill. Bull. Soc. Pliilom. 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. 



Hal. Tropical rivers near the sea, most of the species being American. 



Si/nojysis of the American Species. 



I. Maxillary not extending beyond the anterior I- of eye (in the adult) . 



A. Snout subconical, the upper lip only moderately thick, even in the 



adult 1. monticola. 



B. Snout truncated anteriorly, the upper lip thick. 



Pectoral from less than 4' (adult) to ^ (young) the length of head ; length of 



lower jaw 2i (adult) to ,2| (young) in the length of head 2. nasutus. 



Pectoral ;-} (adult) or n- (young) the length of head ; length of lower jaw 2I3- 



(adult) to 2^ (young) in the length of head 3. 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 4). perco'ides. 



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 5. macracanthus. 



Pectoral nearly reaching the vertical froQi the origin of spinous dorsal in the 

 young, but not in the adult ; first dorsal spine shorter than the longest 

 rays of the second dorsal G. microps. 



1. Agonostomus monticola. 



Mugil monticola, Bancroft, Cuvier's Animal Kingdom (ed. Griffiths), p. 367, t. 36 (1836) '. 

 Agonosioma monticola, Giinth. Cat. Fish. iii. p. 46-1 (1861) '^. 



Agonoatonin.s monticola, Jord. & Everui. Bull. U.S. Nat. Mus. xlvii. 1896, p. 819", and 1900, 

 fig. 31-7 -'. 



Depth of body 3i to 4J in tlie lenstl'. loiit;-fh of head 3=^ to 4.^. Snout from as long to I'' as long as eve, the 

 diameter of which is 'lih to ■'A- m the length of lioad ; iiiterorbital width 2i to 3 in the length of head. 

 Snout subconical, the upper lip nut very thick; mouth subterminal; maxillary extending to below 

 anterior edge or anterior ] of eye; about 20 gill-rakcrs on the lower part of the anterior arch. 38 to 

 44 scales in a longitudinal scries, 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 



