. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 252 Dr. J. D. F. Gilchrist <?n the markedly from the pharyngeal teeth, which form a small part of the inner lining of the sac at its anterior end. They bear a close resemblance to the gill-rakers, which in tliis fish are well developed. One of these, which was cut and treated in the same way, showed the same structure. It was 2"89 mm. in length ; the spines were not, however, slightly curved, as in the oesophageal teeth. The conclusion arrived at is that, in this case,
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 252 Dr. J. D. F. Gilchrist <?n the markedly from the pharyngeal teeth, which form a small part of the inner lining of the sac at its anterior end. They bear a close resemblance to the gill-rakers, which in tliis fish are well developed. One of these, which was cut and treated in the same way, showed the same structure. It was 2"89 mm. in length ; the spines were not, however, slightly curved, as in the oesophageal teeth. The conclusion arrived at is that, in this case, some of the teeth of the oesophageal sacs are teeth of the upper pharyngeals, most of them, however, being homologous with gill-rakers probably arising as an extension backwards of the epithelium of the last gill-arch. Stromateus capensis. The oesophageal sacs in this species form an almost spherical mass, about 17 mm. in diameter in a fish 200 mm. Fig. One of the tooth-like processes of the oesophageal sacs of Stromateus capensis. Magnification the same as Fig. 1. in length, or one and a half times the diameter of the eye. It is nearer the branchial region than in the last case, and is. 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 London, Taylor and Francis, Ltd
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