. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. ON A NEW ENTEROPNEUST FROM MISAKI. 83 in the abdominal region, they remain as only a thickening of the ciliated epithelium at the bottom of the grooves finding in the dorso- lateral angles of the gut wall ; circular muscle layer makes its appearance just external to the longitudinal muscle fibres standing on the gut wall of the anal region1 (Fig. 4, cm/.) ; pygochord dilates slightly along its distal margin (Fig. 4, peli.) Nervous system :—Splanchnic nerve fibre layer is well developed in the buccal and pharyngeal walls ; the lume
. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. ON A NEW ENTEROPNEUST FROM MISAKI. 83 in the abdominal region, they remain as only a thickening of the ciliated epithelium at the bottom of the grooves finding in the dorso- lateral angles of the gut wall ; circular muscle layer makes its appearance just external to the longitudinal muscle fibres standing on the gut wall of the anal region1 (Fig. 4, cm/.) ; pygochord dilates slightly along its distal margin (Fig. 4, peli.) Nervous system :—Splanchnic nerve fibre layer is well developed in the buccal and pharyngeal walls ; the lumen of collar nerve-cord dis- continuous ; roots two solid and directed posterio-dorsally. Vascular system :—at the anterior portion of the proboscis wall, dermal capillaris makes four longitudinal stems, each lies respectively on the sagittal median and mid-frontal planes ; ventral and dorsal medial. Horizontal section passing through the dorsal portion of the collar and the genital pleurae showing the circular ves- sel at the anterior portion of the trunk. c. collar-ccelom, co» circid;ir vessel, g. gonad, /. 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 Nihon Do?butsu Gakkai; To?kyo? Do?butsu Gakkai. Tokyo : Societas
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1897
