Jordan and Evermann. — Fishes of North America. 1317 



and also behind them, slightly depressed above eyes and at nape; ven- 

 tral outline considerably arched; caudal peduncle moderate, about | as 

 long as head, and somewhat longer than deep. Head short and deep, 

 deeper than long; snout very short, blunt, and thick; mouth very small, 

 the maxillary not quite reaching to front of eye. Teeth cardiform, in 

 broad bauds, the outer series enlarged, but smaller than in A. paciftci. 

 Eye large, shorter than snout, about :^ wider than the broad preorbital; 

 lips thick; chin with a median furrow and 2 pores; lower jaw included; 

 anterior nostril much larger than posterior; preopercle rather weakly 

 serrate, its upright limb somewhat concave. Gill rakers short and weak, 

 about 10 on lower limb of arch. Scales rather large, arranged as in 

 related species, those above the lateral line forming series parallel with 

 the back, but placed so that the crossrows are very oblique ; soft parts 

 of vertical fins almost entirely covered with small scales; series of scales 

 also on membrane of pectorals and vtntrals; scaly sheath of vertical 

 fins well developed. Dorsal fin low, rather deeply emarginate, its spines 

 very strong, the second spine slightly longer than the eye and | the height 

 of the third, which is but little shorter than the fourth or longest, and 

 about f length of head; soft rays more than | height of longest spines; 

 caudal rather large, moderately forked, the upper lobe somewhat the 

 longer, about * length of head; anal rather low, itsdistal margin perfectly 

 straight, vertical ; second anal spine very robust, .^ length of head, I longer 

 than the third spine, which is much lower than the soft rays; ventral fins 

 1^ in head, about reaching vent; ]»ectoral fins long, subfalcate, a little 

 longer than head, nearly or quite reaching anal. Color in life, grayish, 

 silvery above, with yellowish tinge; lower part of sides with indistinct 

 darker streaks, formed by clusters of dark points on the margins of the 

 scales; a faint dark bar, most distinct in the youngest specimens, extend- 

 ing from the region in front of the dorsal to, or a little below, the base of 

 pectorals. In young specimens this bar is as wide as the eye, glowing 

 narrower below, but in the adult it is scarcely wider than the pupil; no 

 trace of the black crossbars seen in A. dovii and in A.pacifici, nor of the 

 dark sjiots seen in A. surinamensis, nor of the blue stripes of J. tamiatns; 

 vertical tins and pectorals dusky-yellowish; distal half of ventrals and 

 base of anal blackish; upjier part of head dusky, esi^ecially between eyes; 

 lining of opercle pale, with yellow patches in life; peritoneum white. 

 Pacific coast of Mexico; known from 3 specimens from the harbor of 

 Mazatlan and 1 from Acapulco. The type 9* inches long, {ca'sius, silver 

 gray.) 



romadasys ccesius, Jobdan & Gilbert, Proc. U. S. Nat. Mus. 1881, 383. (Ty{)e, Nos. 28158, 



28333, and 29632, U. S. N". M. Coll. C. H. Gilbert.) 

 Anisotremui ccesius, Jordan & Fesler, i. c, 484, 1893. 



1683. ANISOTREMUS DOVII (Giinther). 



Head 3; depth 2. D. XII, 16; A. Ill, 9; scales 8-48-15. Second anal 

 spine If; third dorsal spine 1*. Body rather deep and compressed. Dor- 

 sal spines very high, the longest 1* in head ; second anal spine very long, 



