334 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. X. 



aa. Body somewhat deeper, the depth 3.1 to 3.3 in length in speci- 

 mens about 150 mm. long; mouth large, the maxillary reaching 

 nearly to vertical from middle of eye. macracanthus, p. 335. 



69. Agonostomus monticola (Bancroft). 



Mugil monticola Bancroft, in Griffith's Edition Cuvier's Animal King- 

 dom, Fishes, 1836, 367, PI. 36 (West Indies). 

 Agonostoma monticola Gunther, Cat. Fish. Brit. Mus., Ill, 1861, 464 



(West Indies). 

 Agonostoma nasutum Gunther, Cat. Fish. Brit. Mus., Ill, 1861, 463 (Rio 



San Geronimo, Guatemala), and Trans. Zool. Soc. London, 1868, 444, 



PI. 70, fig. i. 

 Neomugil digueti Valliant, Bull. Soc. Philom., IV, 1894, 73 (Lower 



California). 

 Agonostomus monticola Jordan & Evermann, Bull. U. S. Nat. Mus., 



XLVII, 1896, 819, fig. 347; Regan, Biol. Cent. Amer., Pisces, 1907, 



66; Meek, Field Mus. Nat. Hist. Pub., Zool. Ser., X, 1914, 118 (both 



slopes of Costa Rica). 

 Agonostomus nasutus Jordan & Evermann, Bull. U. S. Nat. Mus., XLVII, 



1896, 819; Regan, Biol. Cent. Amer., Pisces, 1907, 68, PI. X, fig. 4. 



Head 3. 4 to 4.1; depth 3.1 to 4.1; D. IV-1, 8; A. II, 10; scales 39 to 43. 



Body compressed; upper profile gently convex; head rather small; 

 snout conical, 3.2 to 4.1 in head; eye 3 to 4.9; interorbital 2.85 to 3.4; 

 mouth moderate, nearly horizontal; upper jaw somewhat in advance of 

 the lower; upper lip various, thin, moderately thick, or very thick, its 

 upper margin elevated or not at tip of snout; maxillary reaching to or 

 a little past vertical from anterior margin of eye, 2.6 to 3.2 in head; 

 teeth in bands on jaws, vomer and palatines, the jaw teeth mostly with 

 serrate margins, some with lance-shaped apices; gill-rakers rather short, 

 17 to 20 on lower limb of first arch; scales rather large, ctenoid, extend- 

 ing forward to interorbital area, about 1 2 rows between anterior rays of 

 second dorsal and anal; origin of first dorsal notably nearer tip of snout 

 than base of second dorsal, the anterior 2 spines of equal length poste- 

 riorly when deflexed, the first one somewhat longer than eye and snout; 

 origin of second dorsal nearer origin of the first dorsal than base of 

 caudal, the outer margin of the fin concave; caudal fin with small scales 

 on basal half, moderately forked; anal fin similar to second dorsal, but 

 a little longer, its origin slightly in advance of second dorsal, with 2 

 spines, the first one minute and hidden in the skin in adult ; ventral fins 

 inserted under middle of pectorals, a little nearer origin of anal than tip 

 of snout; pectoral fins placed high, of about the same length as ventrals, 

 1.32 to 1.5 in head. 



