. Synopsis of the fishes of North America [microform]. Fishes; Poissons. 74. SCOMBRID^—SCOMBER. 423 nointed anteriorly. Mouth rather large; preraaxillary not protractile; maxilltiry without supplemental bone; jaws with sharp teeth, large or small. Vomer and palatines toothed or not. Prcoperde entire; opercle unarmed. Gill-openings very wide, the membranes not united, free from the isthmus. Gill-rakers usually long. Pseudobranchiai present, large. A slit behind fourth gill. Branchiostegals 7. Dorsal fins 2, the first of rather weak spines, depressible in a groove, the second similar to the anal
. Synopsis of the fishes of North America [microform]. Fishes; Poissons. 74. SCOMBRID^—SCOMBER. 423 nointed anteriorly. Mouth rather large; preraaxillary not protractile; maxilltiry without supplemental bone; jaws with sharp teeth, large or small. Vomer and palatines toothed or not. Prcoperde entire; opercle unarmed. Gill-openings very wide, the membranes not united, free from the isthmus. Gill-rakers usually long. Pseudobranchiai present, large. A slit behind fourth gill. Branchiostegals 7. Dorsal fins 2, the first of rather weak spines, depressible in a groove, the second similar to the anal; «inal spines weak; last rays of dorsal and anal usually detached and separate, forming series of flnlets; caudal peduncle extremelysleudor, usually keeled, the caudal lobes abruptly diverging, falcate; ventral fins moderate, thoracic, 1,5. Vertebra} in greater number than in Carangidcc, the uuinber more than 25. Pyloric cajca numerous. Air bladder fre- qiieutly absent. Coloration metallic, often brilliant. General?; species about 70, Fishes of the high seas, many of them cosmopolitan, and all having a wide range. Most of them are valued as food-fishes. (Scombrido! lit. aud TrichiuridcB jit. Gliuther, ii, 349-373.) a, Fiulots present; dorsal spines less than 20. {Scombrinw.) b. Spinous dorsal short (of less than 12 spines), remote from the second. c. Vomer and palatines with teeth; corselet obsolete Scomber, 213. cc. Vomer and palatines toothless; corselet well developed Auxis, 214. Ih, Spinous dorsal long (of more than 12 spines), contiguous to the second. d. Caudal keel present. e. Corselet imperfect or obsolete; teeth of jaws strong; minute teeth on vomer and palatines Scombeuomouus, 215. ee. Corselet developed. /. Palatine teeth strong; vomer toothless; vertehne , 216. /f. Palatine teeth villifonn. g. Vomer with teeth; vertebrae normal, the lower foramina small. OUCYNITS, 217. gg. Vomer toothless; abdominal vertebria with the lower foramina en- larged aud
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfishes, bookyear1882
