1422 Bulletin 4.7, United States National Museum. 



lanceolate, the middle rays much produced, as long as head; tubes of 

 lateral line much branched; definite scaly sheaths along bases of dorsal 

 and anal ; basal portions of membranes of vertical fins with series of scales. 

 Bright silvery, the back grayish; lining of cheeks black, a small black 

 blotch on upper third of axil ; ventrals, anal, and lower caudal rays bright 

 orange yellow; fins otherwise dusky translucent. Length 8 inches. Pan- 

 ama, rather common ; numerous specimens were secured. (Gilbert.) Very 

 close to L. acclivis, with which it agrees in almost all details of struc- 

 ture. The color is, however, bright silvery without trace of stripes, 

 as in L. argenteus. The pectoral fin is also much longer, (effulgens, 

 shining.) 



Larimus effulgens, GILBERT MS., Fishes of Panama 1898, Panama. (Coll. Gilbert.) 

 1802. LARIMUS ACCLIVIS, Jordan & Bristol. 



Head 3 to 3fc; depth 2 y'o to 3. D. X-I, 27 to 29; A. II, 5 or 6; scales 6 

 or 7 (counting from third dorsal spine obliquely backward) 47 to 49-10 or 

 11. Body robust, compressed; the back somewhat elevated; profile con- 

 vex. Head narrow, its width 2J to 2| in its length. Snout short, 5J to 5| 

 in head. Eye large, 3fo to 3^ in head. Mouth large, the cleft oblique, 

 less steep than in L. breviceps ; lower jaw curved, considerably pro- 

 jecting; maxillary extending about to middle of pupil, 2 to 2J in head. 

 Teeth minute, firm, uniserial in each jaw. Interorbital region convex, 

 1^ to 1 in eye. Gill rakers 11 or 12 -f 20 or 21, long and slender. Preoper- 

 cle with a finely serrated membranaceous margin. Least depth of caudal 

 peduncle 2J to 3 in head. Scales rather large, mostly ctenoid, cycloid on 

 head excepting those on posterior portion of the top, the rows above lat- 

 eral line abruptly oblique, a character subject to great variation; the 

 scales in the lateral line with about 5 or 6 tubules; anal and dorsal with a 

 sheath at base, the scales of which are cycloid ; the sheath beneath the 

 spinous dorsal not very distinct; the fins excepting spinous dorsal, scaled 

 for a short distance above base with cycloid scales, those on caudal extend- 

 ing halfway to its tip. Origin of spinous dorsal 2J to 2| in origin of soft 

 dorsal ; third dorsal spine If to If in head ; soft dorsal about 1-J- times as 

 long as head; origin of anal 3- to 3| in head; second spine moderate, If 

 to 2 in head, not reaching tips of soft rays; .ventrals reaching slightly 

 past vent, 1& in head; pectorals reaching slightly past tip of ventrals 

 equaling, or 1 in, head. Color grayish silvery, darker above, clear silvery 

 white below; conspicuous dark brown or black stripes on back and sides 

 following the rows of scales, formed of more or less coalescent dark spots; 

 lower part of head bright silvery; a large steel-blue axillary spot; region 

 about pseudobranchue largely black ; region in lower part of mouth bright 

 orange, and traces of orange in upper part; lower mandible blackish; 

 tongue dusky at tip; a somewhat indistinct narrow streak of plain dark 

 brown extending from a point in the median line, f the distance from the 

 first dorsal spine to tip of premaxillary, obliquely backward and flown ward 

 to or nearly to the lateral line, this streak more clearly seen in dry speci- 

 mens ; fins dusky ; spinous dorsal dark brown ; ventrals yellowish, dusky at 

 tip ; both ventrals and pectorals darker on their inner than on their outer 

 surfaces. This species differs from L. Irenccps chiefly in the shorter 



