. Contributions to North American Ichthyology [microform] : based primarily on the collections of the United States National Museum. Ichthyology; Fishes, Fresh-water; Fishes; Ichtyologie; Poissons d'eau douce; Poissons. SILUBID^. 75 tioD of tbe snpraoccipitHl or interparietal bone into the bead of tbe second interspinal. A firm and immovable bridge is thus formed, vrbicb gives an uniuterrnpted passage from the dorsal fin to tbe snout. Tbe silveiy coloration is also a marked distinguishing feature. It is not generally true that tbe species of Ichthcelurua reach a larger size than those of the o
. Contributions to North American Ichthyology [microform] : based primarily on the collections of the United States National Museum. Ichthyology; Fishes, Fresh-water; Fishes; Ichtyologie; Poissons d'eau douce; Poissons. SILUBID^. 75 tioD of tbe snpraoccipitHl or interparietal bone into the bead of tbe second interspinal. A firm and immovable bridge is thus formed, vrbicb gives an uniuterrnpted passage from the dorsal fin to tbe snout. Tbe silveiy coloration is also a marked distinguishing feature. It is not generally true that tbe species of Ichthcelurua reach a larger size than those of the other genera. Amiurua nigricans and Pe- lodichthys oUvaria far exceed in size any of the species of Ichthaslurua. ANALYSIS OF SPECIES.* *. Aual fin extremely elongate, its base about one-third the len}j;th of the body (without caudal); its rays 32 to 34 in number ; eye small, wholly anterior, the middle of the head being entirely behind its posterior margin; head small,about 4^. in length; depth 4 iu adults to 5^ in younger specimens; slope from dorsal to snout somewhat concave, especially in adults; pectoral spine 1^ in bead; skin thin; color brightly silvery Fuhcatus, 1. ". Aual tin shorter, 3^ to 4 in length ; its rays 24 to 30. moderate-sizud, anterior, the middle of the head being wholly behind it; anal rays 27 to 30 ; body comparatively stout and deep, compressed behind; the dorsal region elevated ; depth 3^ to 4 in length; head pretty large, 4| to 4^ iu length, one-third longer than broad ; spines moderate, strong, little more than half-bead; profile from dorsal to snout more or less depressed or concave; skin rather thick; colors pale Robu8TU8,2 it. Eye large, placed mesiul]y,the middle of the length of the head falling within the eye; anal rays 25 to 29; head moderate, about 4 in length; depth about 5; body more elongate and less deep than in robustiia, the head rather smaller, the eye larger, and the dorsal region less elevated; pectoral and dorsal opines lo
Size: 802px × 3117px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookce, bookdecade1870, booksubjectfishes, booksubjectichthyology
