The natural history of fishes, amphibians, & reptiles, or monocardian animals . placed,generally, on all the maxillary bones, the palatines,and the vomer: in some species, like the smelt, thereare very few teeth in the latter part; and the lowerjaw, in both sexes, is longer than the upper; butas this is a typical group, such slight variations arealways to be expected. In the Salmo tumbil (Bloch,436.), we have the first material deviation from thetypical characters. The pectoral is placed higher uptowards the back; the ventral fin is before the firstdorsal; and although not greatly developed, i
The natural history of fishes, amphibians, & reptiles, or monocardian animals . placed,generally, on all the maxillary bones, the palatines,and the vomer: in some species, like the smelt, thereare very few teeth in the latter part; and the lowerjaw, in both sexes, is longer than the upper; butas this is a typical group, such slight variations arealways to be expected. In the Salmo tumbil (Bloch,436.), we have the first material deviation from thetypical characters. The pectoral is placed higher uptowards the back; the ventral fin is before the firstdorsal; and although not greatly developed, is yet aslarge as the pectoral: the lower jaw, as in the smelt b 3 246 CLASSIFICATION OF FISHES. (Salmo Eperlanus), is longest; but, in all other respects,the head of this fish is a compound of Salmo andLaurida,— two genera widely separated by Cuvier, butwhich actually pass into each other in the most gradualmanner: the Salmo foetans (Bloch, f. 2.) bringsus, in fact, at once into the genus Laurida (Laurida Me-diterranea Nob., fig. 48.), the peculiar and discriminat-. ing character of which is, that the ventral fin is so muchdeveloped as to be considerably larger than the pec-toral, near to which it is placed,—and not, as in Salmo,immediately under the first dorsal. Some of the Lau-ridce of America (L. niicrops,fig. 49-) have the eyes very
Size: 2728px × 916px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectreptiles
