Bulletin 4.7, United States National Museum,. 



Body long, slender, compressed; snout pointed, its length equal to 

 diameter of orbit or to iiiterorbital space; mouth almost horizontal, its 

 cleft extending to vertical from anterior edge of orbit; lips thin ; teeth 

 4-4, strong, slightly hooked, the hook barely evident on lower tooth; 

 three upper teeth with a grooved grinding surface ; gill-rakers 3+7, short, 

 pyramidal, and far apart; alimentary canal short; peritoneum silvery; 

 lateral line complete, decurved to a point in a vertical midway between 

 pectoral and ventral fins, from which it extends in a straight line a little 

 below middle of body to the caudal; fins all very high and pointed; 

 dorsal inserted directly over origin of veutrals, falcate when depressed, 

 its first ray longest; anal similar in shape, inserted at a point $- the dis- 

 tance from tip of snout to base of caudal; ventrals extending to vent, tip 

 of pectoral reaching ventrals; caudal deeply forked. Color silvery; a 

 narrow, dark median band extending down from occiput to base of caudal ; 

 dorsal scales with fine dots which give their edges a dusky color. 



One specimen known, careful measurements of which are given : 

 Length of body in millimeters 74; depth of body, expressed in hundredths 

 of length, 25; depth of caudal peduncle 11; length of head 25; width of 

 iiiterorbital space 7; length of snout 7; diameter of orbit 7; distance 

 from snout to dorsal fin 47 ; height of longest dorsal rays 26 ; distance from 

 snout to anal fin 67; height of longest anal rays 21; distance from anal 

 to caudal fin 27; length of caudal fin 3^; length of pectoral fin 22; dis- 

 tance from snout to ventral fin 62; length of ventral fin 21. (Jordan & 

 Snyder.) 



Only the type known (No. 6152, L. S. Jr. Univ. Mus.) collected by J. O. 

 Snyder in Laguna de Chapala, near Ocotlan, Jalisco, Mexico. 



(Named for the type locality.) 



Falcula chapalce, JORDAN & SNYDER, Bull. U. S. Fish Com. 1899 (1900), 124, Laguna de 

 Chapala, Mexico. 



Page 311. Before Agosia nubila (Girard), insert the following: 

 514 (a). AGOSIA KLAJIATHENSIS, Evermann fc Meek. 



Head 4; depth 4; eye 4| in head; snout 3|; D. I, 8; A. I, 7; scales 

 about 14-78-10 (average, 73 in 49 specimens). 



Body robust, subcylindrical, back somewhat elevated ; snout rather long, 

 mouth inferior, little oblique, the lower jaw included; maxillary not 

 reaching front of orbit; upper lip without frenum; barbel present, but 

 small. Lateral line incomplete, interrupted in many places, about 30 

 pores developed. Origin of dorsal fin midway between front of pupil and 

 base of caudal fin; pectoral rather short, reaching about three-fourths the 

 distance to base of ventrals; ventrals reaching vent; anal large, its 

 longest ray li in head; caudal widely forked. 



Color in alcohol : Olivaceous, mottled and blotched with darker on back 

 and side ; under parts pale ; an obscure pale streak from eye to base of 

 caudal fin, below which is a broad dark band; dorsal, pectoral, and caudal 

 dusky ; other fins plain ; a black blotch at base of caudal. 



An examination of 48 specimens shows all the important characters to 



