. The fishes of North and Middle America [microform] : a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Fishes; Fishes; Poissons; Poissons. .'I m I 1773 Dulldm //, United States National Museum. ee. Lower Jaw niiioli projecting; lutad broad, nknll iiHiially (midvi^x; iTuninl ridges when jireMcn* uwnally low. Gill rakers very long ami Hlcndor; iiHiially hiiiooMi, lew, if any, ancs. Hory scales. Hrancliiostegals and lowei ,jaw Mcalcd. I'oics of lower Jaw concealed except in sonic species of Acuto- mentum
. The fishes of North and Middle America [microform] : a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Fishes; Fishes; Poissons; Poissons. .'I m I 1773 Dulldm //, United States National Museum. ee. Lower Jaw niiioli projecting; lutad broad, nknll iiHiially (midvi^x; iTuninl ridges when jireMcn* uwnally low. Gill rakers very long ami Hlcndor; iiHiially hiiiooMi, lew, if any, ancs. Hory scales. Hrancliiostegals and lowei ,jaw Mcalcd. I'oics of lower Jaw concealed except in sonic species of Acuto- mentum. /. I'niocular 8i)ine» well develojied. Perilimeuni black. g. rostocnlar spine present. Siii)raocn'ar, tyniimnic and occipital si>ines well developed. Second anil 8]dne HtronKcr and usually longer than tlietliirl. Synipliyseal knob strong, proJe(!ting forward. Dorsal low. Lower pectoral rays normal, not thickened. No s))ins on inter-and subopcrclcs. (Mandible and »naxillary scaled.) gg. rostoculnr 8]>ineH not develoi)ed. Siipraoeidar and tyni|>anic sometimes iiresent, always concealed by the skin. Oc(ii)itals ending in s)>ines or nol. Interorbital wide, convex. Lower pectoral rays thickened, their tips projecting beyond itted. Mouth small, narrow. Spines ou inter- and suit opercle sometimes present, reritoneum black. I'' f/. Preocular without sjdne; skull smooth, without s|) Lower pectoral rays norniiil. No s|iincs on inter, or suboperclc. I'eritoneum usually white. Skhastosomus. dd. Parietals separated by the supraoccipital.* h. Uranium with parietal ridges only. Lower Jaw much project- ing, entering the iirotile; a prominent knob directi'il forward. Head broad, convex. Interorbital con- vex, nearly smooth. Lower pectoral rays normal; no spines on inter- anil .wubopercle. Exposed hrancliiostegals, maxillary, and mandibles densely scaled. Pores of lower Jaw concealed by the scales. hh. Crfiniuiu with m
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectfishes
