. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. SPer. il := Fig. 53. Fig. 54. Figs. 53, 54.—A. imsilla. Specimen from California, antero-veutral (Fig. 53) and dorsal (Fig. 54) views of the anterior end, for comparison with Figs. 51. 52. Per, Peristomium; , Achaetous body-segment (note the strongly developed groove between these segments, see p. 37). A. claparedii. Tlie anterior end of one of these, from Crescent City, California, is represented in Figs. 53, 54, which show that, making due ^ To establish, beyond doubt, the absen

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. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. SPer. il := Fig. 53. Fig. 54. Figs. 53, 54.—A. imsilla. Specimen from California, antero-veutral (Fig. 53) and dorsal (Fig. 54) views of the anterior end, for comparison with Figs. 51. 52. Per, Peristomium; , Achaetous body-segment (note the strongly developed groove between these segments, see p. 37). A. claparedii. Tlie anterior end of one of these, from Crescent City, California, is represented in Figs. 53, 54, which show that, making due ^ To establish, beyond doubt, the absence of statocysts, it woiikl be necessary to make serial sections of the anterior end, a course which is obviously precluded in this 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 Ashworth, James Hartley, 1874-1936; Ashworth, James Hartley. London, Printed by Order of the Trustees of the British Museum

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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912