42 ACANTHOPTEETGII. 



II. Dorsal fin scalelcss, except at the base ; second anal spine longer than third. 



A. Maxillary not extending beyond the vertical from anterior margin of eye. 

 Second anal spine r; the length of head; depth of body 3 in the lengtii . . . ^.hnnucki. 

 Second anal spine -V to J the length of head ; depth of body 3^ in the length . A-, boiicardi. 



B. Blaxillary extending to below anterior part of eye. 



00-70 scales in a longitudinal series 5. bdijanns. 



5 1-62 scales in a longitndiual series <>• crocru. 



I. Pomadasis lenciscus. 



/'nsiijioina lei/ciscu.s,Llunt\\. Proc. Zool. Soc. ]8()t, p. 147 'j and Trans. Zool. Soc. vi. 1868, p. 416, 



t. 66. tig. 3". 

 roinadasis leuciscus, Jcn'd. & Gilb. Proc. U.S. Nat. ^lus. 1881, p. 387 ' ; .lord. ^' Fesler, Rep. U.S. 



Fish. Comm. 1893, p. 19.V'. 

 lh-ai:hydmten(s leuciscus, .lord. & f^verm. Bull. U.S. Nat. Mns. xlvii. 1898, p. 13,27 '; (lilb. & 



Starks, Mem. Calif. Ac. Sci. iv. 1901, p. 109". 



Depth of body 3 ia the h^ngth, length of head ;!. Snout .t little longer than eye, the diameter of \vliich is 

 4-5 in the length of head; interorbital wnlth 4.' — !-;> in the length of head. Pncorbitul deep, its depth 

 greater than tVie diameter of eye. j\Iaxilhiry not quite reaching the vertical from the anterior margin of 

 eye. 11 or 12 giU-rakcrs on the lower jiart of anterior areh. 'M-oQ scales in y lon_^itudiiial series, 

 .5 between lateral lino and middle of dorsal tin. fJorsal XII 14-1.") ; third or fourth spine longest, j or 

 less than r- the length of head. Anal 111 7-8 ; second spine not longer than third, \-\ the length of 

 liead. Pectoral -;j-i the length of head. Caudal emart;inate. Silvery, back darker; indistinct dark 

 longitudinal lines on the side; edge of opercular membrane blackish; often a blackish blotch in the axil 

 of pectoral ; dorsal and caudal fins dusky. 



llab. Pacific Coast from Califoruia to Peru, entering rivers : 



Lower California ^\ — IMexico, Mazatlan •'^ ; Guateuiala, Sau J(jse and Cliia[nnii 

 {:Salviu ' -) ; Panama 5« (Dow -).— Northern Peru •'^. 



Here described from four specimens, 2G0-300 mm. in total length, from Panama 

 and Chiapam. 



'2. Pomadasis Biacracantliiis. 



I'nstijjoiua iiiitcracaiU/ium., Giinth. Proc. Z(jol. Soc. 18G1, p. 146', and Trans. Zool. Soc. vi. 1868, 



p. 416, t. 64. tig. 1 -. 

 PomudusiS m(i.crucinUl,,us, Jord. oi I'Y'sler, Hep. U.S. Fish. Comm. 1893, p. 193 ' ; Joi'd. & lA'crni. 



Brdl. U.S. Nat. Mns. xlvii. 1898, p. 1332 '. 



l)o[jth of body -;^-.:! in the hjn^th, length of head l''-3. Siinut 1.1-1 H as lonp; as eye. tiie diameter nf which 

 is 4^— of in the f'ii,:^;l!i (d' head; interorbital widlb l.l-.a in the length of head. Slaxdlary not e.xtoiuiini; 

 to below the eye. 1.5 oi' 1 (i t;ill-r,akers on the lower part of anterior arch. 44-1'.) scales in a loiii;iludiii:il 

 series, 4 or O bi'tu ecu lnt(jral line and middle of diu's.al lln. Dorsal XII J :.! ; fourth or titth s[iine lon,i,'esl, 

 ^— ;] the length of head. Anal 1118; second spine lonL;est, about h the leni;dh of head. Pectoral 

 as long, or nearly .is long, as tiie he.id. (Jaanlal slightly cmargiiuitc. Caudal [ledunelo abmU. 1' as 

 long as deep, back dark; lower part of side sdvery ; sometimes 3 or 4 dark cross-bars on the side; 

 ti.as dusky. 



