. 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 i. m .:â i !l 2586 Bulletin ^7, United States National Museum, nostril fossa; u double series of scales intervunes between the nustrils uud the orbit; lower side of suout wholly naked anteriorly, partly scaled lat- erally. Mouth large, overhung by premaxillaries for a distance about i diam«'ter of orbit; premaxillaries in advance of nostrils; luaxillaries reaching verti
. 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 i. m .:â i !l 2586 Bulletin ^7, United States National Museum, nostril fossa; u double series of scales intervunes between the nustrils uud the orbit; lower side of suout wholly naked anteriorly, partly scaled lat- erally. Mouth large, overhung by premaxillaries for a distance about i diam«'ter of orbit; premaxillaries in advance of nostrils; luaxillaries reaching vertical from posterior margin of pupil, 2f in head; snout about equaling intcrorbital width; barbel long, % orbit. Teeth in cardiforni bands of equal width in both jaws, narrowed laterally, but not to a singht series; anterior series in upper Jaw enlarged, in lower jaw all the teeth of equal size. Preopercle broadly rounded, the angle but moderately pro- duced, a narrow strip of the interoperclc visible for its entire length; outer gill arch partially joined to cover, as usual; gill rakers obsolete; gill membrane^ unitod, forming a wide free fold across isthmus posteriorly. >Scalcs without ridges, their exposed surfaces thickly beset with spines which are usually without definite arrangement; the marginal spine longest, thence decreasing in length to the base, about 40 present on eiich scale on middle of sides; scales on head crowded, the spines shorter and jiot directed backwai'd as on the body; a rosette of short spines on tip of snout; no naked area between ^'^entrals; mandible and gill ;^s partly scaled; no considerable naked area in axil of pectorals. Dorsal in- serted over base of pector.*l8, the length of its base slightly lesb than \ the interspace between base of dorsals; second dornal spine rather short and fragile, furnished anteriorly with a series of retrorre spiniiies, its length slightly exceeding ^ that of head, its tip not reaching origin of secon
Size: 1379px × 1811px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectfishes
