. Brain and body of fish; a study of brain pattern in relation to hunting and feeding in fish. Fishes -- Anatomy; Nervous system -- Fishes; Brain. THE CENTRAL ACOUSTIC LOBE 61 The acoustic tubercles are well developed. The optic lobes are apparently large, but tiiis is due to the tecta optica being widely separated by a large valvula, just as in the barbel. In this fish the pursuit of food is obviously mostly by taste, touch, and smell. What conclusions can be drawn from the study of the herring's brain of the functions of the central acoustic lobe ? This problem PLATE 11.— — ^'^- f' \
. Brain and body of fish; a study of brain pattern in relation to hunting and feeding in fish. Fishes -- Anatomy; Nervous system -- Fishes; Brain. THE CENTRAL ACOUSTIC LOBE 61 The acoustic tubercles are well developed. The optic lobes are apparently large, but tiiis is due to the tecta optica being widely separated by a large valvula, just as in the barbel. In this fish the pursuit of food is obviously mostly by taste, touch, and smell. What conclusions can be drawn from the study of the herring's brain of the functions of the central acoustic lobe ? This problem PLATE 11.— — ^'^- f' \y^^^^:^^!^''<.\'\ Base of cerebellum (high power) showing desussating fibres and round-celled tissue of central acoustic lobe. One acoustic tubercle with lateral line nerve and fibres connecting the lateral and central lobes. The eighth nerve is seen and fibres to it from the central acoustic lobe. can be attacked by the method of elimination. The positive facts point to the conclusion that sight is an important fact, as witness the large optic lobes, and that taste and the gustatory organs can take but little part, as shown by the insignificance of the facial lobe. It would be contrary to the general rule that appears in our study of the carp family, if there was not some functional significance in the presence of the large central lobe we have described. The herring, in the first place, possesses a very elaborate organ of hearing. 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 Evans, Harold Muir, 1866-. Philadelphia, The Blakiston company
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectbrain
