Jordan and Evcnnann. — Fishes of North America. 1399 



upper jaw. Preorbital narrow, not wider than the pupil. Eye large, 

 slightly shorter thau snout, which is about equal to interorbital width. 

 Preupercle with a membranaceous flap at its angle, which is striate and 

 slightly fringed at its edge. Gill rakers rather strong and slender, few in 

 number; pseudobrauchiie well developed; nostrils small, the posterior 

 vertically oblong. Scales small, nearly smooth, deciduous ; dorsal and anal 

 lins closely covered with small scales; lateral line little arched, becom- 

 ing straight behind vent; first dorsal small, its spines slender, the highest 

 '1\ in length of head, first spine minute or obsolete, the second not much 

 .shorter than third; space between dorsal fins about equal to diameter of 

 eye, 3} in head; soft dorsal moderate, its longest ray a little less than \ 

 length of head; caudal shortish, slightly double-concave, its middle rays 

 about ^ length of head; base of anal | length of head, its spines rudimen- 

 tary; ventrals \ lenjjth of head, reaching halfway to vent, which is close 

 in front of anal ; pectorals reaching considerably beyond tips of ventrals, 

 their length 1^ to 1^ in head, 4'; to \\ in body. Flesh comparatively soft. 

 Color in life: Bluish-gray above ; grayish-silvery below; top of snout and 

 tip of lower jaw blackish; inside of mouth yellow, with black on lower 

 lip within; linings of opercles black, bordered with pale orange; dorsals, 

 caudal, and pectorals with fine black punctulations, the ground color in 

 all except the spinous dorsal faintly yellowish; anal white, the anterior 

 part and the tips of most of the rays yellowish, punctate with black ; ven- 

 trals white, immaculate; a dark blotch behind orbit and another on upper 

 rays of pectoral within. This species is extremely close to I. parvi2nnnis, 

 differing only in the characters above mentioned. Panama; on sandy 

 shores; rather common, {remus, oar; fero, I bear, from the long pec- 

 torals.) 

 Isnpisthiis remifrr. Jordan & Gilbert, Bull. V. S. Fish. Coinm. 1881, 320, Panama. 



(Typ.^ No. 29169, V. S. N. M. Coll. Gilbert.) 

 Archosion rcrnifer, Jordan & Eigenmann, I. c, 353, 1889. 



1772. ISOPISTHIIS PARVIPIiNNIS (Ciivier .V Valenciennes). 



Head 3i; depth 3^ D. VIII-I, 21; A. II, 16 or 17; scales about 100, -.52 

 to 54 pores. Body much compressed; pectorals shortish, the upper rays 

 longest, 1^ in head; upper canines very long, recurved; three canines on 

 the sides of the lower jaw; base of soft dorsal 1^ times length of base of 

 anal; distance between dorsals about equal to diameter of eye; caudal fin 

 subtruneate; color dark plumbeous above, rest of body yellowish-white; 

 no axillary spot; an indistinct elongate dark blotch from behind the eye 

 to middle of opercle. Coast of Brazil, north to Cayenne. Only the orig- 

 inal type of this sjiecies in the ]\Iuseum of Paris has been examined by us. 

 This seems to be identical with the species well figured by 8teindachner 

 under the name Isopisfhiis affiiiis, and from Steindachner's description and 

 figure our account has been chiefly drawn, {parvus, small; jyinna, fin.) 



Anci/lodon parvipinni.i, Cuvier & Valenciennes, Hist. Xat. Poisa., v, 84, 1830, Cayenne; 



Gunther, Cat., II, 312, 1860. 

 Iso2JistJius affinis, Steindachner, Deulssch. Mat. Nat. Kais. Acad. Wiss. 1879, 43, pi. 2, 



fig. 2, Porto Alegre. 

 Isopisthus parvipinnig, Jordan, Proc. Ac. Nat. Sci. Phila. 1883, 289 ; reexamination of type. 

 Archoscron parvipinnis, Jordan & Eigenmann, I.e., 353, 1889. 



