. Discovery reports. Discovery (Ship); Scientific expeditions. 01 MM Fig. 6. Acanthocheilus qiiadiiden- tattis. Anterior end of female, dorsal view. Fig. 5. Acanthocheilus quadri- dentatus. Anterior end of female, dorsal view, , cervical papilla; /., intes- tine; , nerve-ring; oes., oesophagus ;t'., ventriculus. is surrounded by the nerve-ring at 0-55 mm. from the anterior extremity. There is no intestinal caecum running forward by the side of the oesophagus, nor is such a structure mentioned by Molin or by Orley, though in another species, A. nidifex Linton, 1900, such a caecum is sai
. Discovery reports. Discovery (Ship); Scientific expeditions. 01 MM Fig. 6. Acanthocheilus qiiadiiden- tattis. Anterior end of female, dorsal view. Fig. 5. Acanthocheilus quadri- dentatus. Anterior end of female, dorsal view, , cervical papilla; /., intes- tine; , nerve-ring; oes., oesophagus ;t'., ventriculus. is surrounded by the nerve-ring at 0-55 mm. from the anterior extremity. There is no intestinal caecum running forward by the side of the oesophagus, nor is such a structure mentioned by Molin or by Orley, though in another species, A. nidifex Linton, 1900, such a caecum is said to be present. At a point 0-67 mm. from the anterior end there is a pair of small, button-like cervical papillae. The excretory pore is probably close to the base of the ventro-lateral lips. Molin describes each of the three lips as having a single median papilla, while Orley also appears to refer only to three cephalic papillae. In the present specimen the dorsal lip bears a pair of lozenge-shaped papillae, while on each ventro-lateral lip one such large papilla is present towards the ventral border. It is uncertain whether or not there is a smaller papilla near the lateral border. Each lip bears on its inner surface the. 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 Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography; Great Britain. Colonial Office. "Discovery" Committee. London, New York, Cambridge University Press
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificexpedition
