Jordan and Evermann. — Fishes of North America. 937 



427. CHLOROSCOMBRUS, Ciiiaid. 

 (Casaijes.) 



CIihroKcnmhni.i, GlRARl>, Proc. Ac. Nat. Soi. Phila., 1858,1(58, (cnsmnpoUla). 



Micropterijx, GiiNTiiEn, and otlipis, but Mirropleriix, Agassiz, was given as a sulistitutn f ( ir Scno?r(, 

 of which name it must 1)0 consideied a sj-nuiiyni. 



Body oblong ovate, closely conipiessed, bnt not elevated ; the abdomen 

 prominent anteriorly, its curve being much greater than the curve of the 

 back. Occiput and thoracic region trenchant. Caudal peduncle very 

 narrow,thefin widely forked. Scales small, smooth. Lateral line arched 

 in front, unarmed, or with a few small plates. Head nearly naked. Pre. 

 orbital low. Mouth rather small, oblique, lower jaw scarcely projecting ; 

 upper jaw protractile; maxillary broad, emarginate behind, with a largo 

 supplemental bone. Jaws, vomer, and palatines with feeble teeth, mostly 

 in single series. First dorsal of feeble spines, connected by membrane; 

 second dorsal and anal long and low, similar, ranch longer than the short 

 abdomen. No tinlets. Anal spines strong. Ventrals small; pectorals 

 falcate. Gill rakers long. American ; small species, little valued as 

 food. (,YAwp6f, green ; (T«6/z/J?pof, mackerel.) 



a. Chord of cvirved pait of lateral lino considerably longer than head, 13., to 13 in straight 

 part; lateral lino armed posteriorly with small bony shields, as in Voiiinr; coloration 

 rather dusky, the fins largely tipped or edged with blackish. orqueta, 1333. 



aa. Chord of curved part of lateral line about as long as head, measured from tip of lower 

 jaw, and \"<^ to 1% in length of straight part; lateral shields wholly obsolete; color- 

 ation rather pale. chrysurus, 1334. 



l.?33. CHLOROSCOMBRUS ORQUETA, Jordan k Gilbert. 

 (OrQUETA ; XUREL 1)E Castili.a.) 



Head 3J ; depth 2^. D. VIII-I, 26 ; A. II, 26. Body ovate, strongly 

 compressed, the edges trenchant. Dorsal and ventral outlines very regu- 

 larly curved, the curve of the belly considerably stronger than that of the 

 back, the axis of body much nearer the latter. Caudal peduncle very slen- 

 der. Young less elongate than the adult, otherwise very similar in form. 

 Head small, rather pointed, the anterior profile nearly straight. Mouth 

 small, very oblique, the lower jaw projecting. Maxillary broad, extend- 

 ing a little beyond front of eye, its length 2| in head, its tip niarginate; 

 supplemental bone well developed. Teeth very small, those of the jaws 

 not villiform, forming very narrow bands or single series in both jaws; 

 villiform patches on vomer, palatines, and tongue. Adipose eyelid well 

 developed. Preorbital very narrow, not half width of orbit. Gill rakers 

 numerous, very long, slender, close-set. Head nearly naked. Body cov- 

 ered with well-developed imbricated scales; the ventral ridge, and a nar- 

 rowly triangular area forward from front of dorsal naked. Lateral line 

 with a rather strong arch anteriorly, the chord of the curve being consid- 

 erably longer than head, and 1^ to 1? in the straight part. (In Chloroscotn. 

 hrus chrysurus the chord of the curve is about as long as head from tip of 

 lower jaw, and Ij to If in the straight portion.) A distinct keel along 

 caudal peduncle, the scales of lateral line enlarged- and bony, with 



