. British and Irish Salmonidæ. Salmonidae. FiR. 20. Fig. 21. Fig. 22. circumstances. Fig. 22, is that of an adult salmon; fig. 21, of a female Lochleven trout, 19 in. long; and fig. 20, of a salmon-trout, S. trutta, also 19 in. long, and having 52 Cfecal appendages. Trout from other localities, of the same size, show- but very little individual differences to what is seen in the above figures.* The forms of the opercles will be subsequently alluded to and figured. Respecting the size of the fins of trout, those in fresh-water forms are generally more developed than in marine ones, in young fi
. British and Irish Salmonidæ. Salmonidae. FiR. 20. Fig. 21. Fig. 22. circumstances. Fig. 22, is that of an adult salmon; fig. 21, of a female Lochleven trout, 19 in. long; and fig. 20, of a salmon-trout, S. trutta, also 19 in. long, and having 52 Cfecal appendages. Trout from other localities, of the same size, show- but very little individual differences to what is seen in the above figures.* The forms of the opercles will be subsequently alluded to and figured. Respecting the size of the fins of trout, those in fresh-water forms are generally more developed than in marine ones, in young fish than in old ones, and in males than in females. The pectorals, which are shorter in trout than in salmon, • For figures showing the gradual change of the form of the preopercle with age, sec Lochleven trout, t a * 10 *. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Day, Francis, 1829-1889. London [etc. ] Williams and Norgate
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectsalmoni, bookyear1887
