68 PERCESOCES. 
Specimens in the British Museum, measuring up to 250 mm. in total length, from 
the Rio Presidio in Sinaloa, the Rio Mascota in Jalisco (Buller), and Vera Cruz 
(Meek) appear to belong to the same species as others from Cuba, Jamaica, Barbados, 
and Trinidad. 
2. Agonostomus nasutus. (Tab. X. fig. 4.) 
Agonostoma nasutum, Giinth. Cat. Fish. iii, p. 463 (1861)'; and Trans. Zool. Soc. vi. 1868, 
p. 444, t. 70. fig. 2°. 
Neomugil digueti, Vaill. Bull. Soc. Philom., iv. 1894, p. 73°. 
Aygonostomus nasutus, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 820°. 
Depth of body 31 to 41 in the length, length of head 4 to 44, Snout from as long to 13 as long as eye, the 
diameter of which is 4 to 52 in the length of head; interorbital width 22 to 24 in the length of head. 
Snout vertically truncated, the upper lip thick anteriorly, its depth 3 the length of snout; mouth 
subterminal; maxillary extending to below anterior edge or anterior } of eye; lower jaw broadly 
rounded, its length 24 (adult) or 2? (young) in the length of head; length of groove between lower lip 
and ramus of lower jaw (measured from its anterior extremity to the end of the maxillary) equal to the 
diameter of eye (adult) or less (young). 18 to 20 gill-rakers on the lower part of the anterior arch. 
41 to 43 scales in a longitudinal series, 12 to 14 in a transverse series from spinous dorsal to in front of 
vent, 21 or 22 round the caudal peduncle. Dorsal IV, I 8 (exceptionally 7); origin of spinous dorsal 
a little nearer to tip of snout than to base of caudal; spines moderate, the first from less than 3 (adult) 
o 2 (young) the length of head, shorter than the longest rays of the second dorsal, which has the free 
edge concave. Anal II 10. Pectoral from less than 2 (adult) to + (young) the length of head, extending 
to below the spinous dorsal in the young, but not in the adult ; ventrals originating below the middle of 
the pectoral, extending about 4 of the distance from their base to the origin of anal. Caudal forked. 
Caudal peduncle 13 to 2 as long as deep. Silvery, back darker; scales with dark edges; a blackish spot 
on the base of pectoral; a more or less distinct silvery lateral band. 
Hab. Lowser CaLiForNiaA, MExico, AND CENTRAL AMERICA. 
Specimens in the British Museum trom Lower California (Diguet *); Mexico, 
Motzorongo (Meek); Guatemala, Rio San Gerénimo (Owen1!?), Rio Motagua 
(Salvin?) ; Costa Rica, Juan Vifias (Underwood). 
Professor Vaillant has very kindly sent me two specimens of Neomugil digueti, one 
of which is now figured (Tab. X. fig. 4). 
3. Agonostomus salvini. (Tab. XI. fig. 2.) 
Agonostonus salvini, Regan, Ann. Mag. Nat. Hist. (7) xix. 1907, p. 66°. 
Depth of body 31 to 4} in the length, length of head 4. Snout 13 to 2 as long as eye, the diameter of which 
is 42 to 64 in the length of head; interorbital width 25 to 3.im the length of head. Snout vertically or 
obliquely ‘truncated, the upper lip rather thick anteriorly, its depth 2 the length of snout; mouth 
subterminal; maxillary extending to below anterior ; or anterior 3 of eye; lower jaw evenly rounded, 
its length 24 (adult) or 23 (young) in the length of head; length of groove between lower lip and ramus 
. of lower jaw (measured from its anterior extremity to the end of the maxillary) equal to the diameter of 
eye (young) or 14 the diameter of eye (adult). 18-20 gill-rakers on the lower part of the anterior arch. 
38 to 40 scales in a longitudinal series, 12 or 13 in a transverse series from spinous dorsal to in front of 
vent, 21 or 22 round the caudal peduncle. Dorsal IV, 18; origin of spinous dorsal equidistant from tip 
of snout and base of caudal or a little nearer the former; spines moderate, 2 (adult) or 3 (young) of the 
