. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. NEW SPECIES OF POLYCHAETA FROM MARION ISLAND 251. Fig. 1. Orbimella dayi sp. nov., holotype, 5 mm. A. Entire worm. B. Head and anterior six segments. C. Posterior end, ventral view. D. Anterior parapodium, post-setal lobe arrowed. E. Notoseta. F. Posterior parapodium. G. Notoseta. H. Capillary neuroseta. I. Neurosetal hook. Scales in mm. Description (of holotype) Body length 5 mm, width mm, 35 segments, separated by deep inter- segmental constrictions. White in alcohol. Prostomium bluntly triangu
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. NEW SPECIES OF POLYCHAETA FROM MARION ISLAND 251. Fig. 1. Orbimella dayi sp. nov., holotype, 5 mm. A. Entire worm. B. Head and anterior six segments. C. Posterior end, ventral view. D. Anterior parapodium, post-setal lobe arrowed. E. Notoseta. F. Posterior parapodium. G. Notoseta. H. Capillary neuroseta. I. Neurosetal hook. Scales in mm. Description (of holotype) Body length 5 mm, width mm, 35 segments, separated by deep inter- segmental constrictions. White in alcohol. Prostomium bluntly triangular with rounded tip and no eyes or appendages. Proboscis not extrusible. First two segments asetigerous. Following setigerous segments separated from one another by deep intersegmental constrictions. Gills absent. Parapodia form lateral ridges near the anterior margin of each segment with a small foliose post- setal lobe, largest at the origin of the notosetae (Fig. ID). Anterior 10 segments shorter and broader than the posterior segments, which are slightly biannular. Four or five notosetae project from the upper margin of the anterior parapodia, which is elongated to form a small posterior lobe. Notosetae crenulate capil- laries with distinct teeth and long curved tapering tips. Notosetae of posterior segments similar but shorter. Neurosetae arise from the lower edge of the parapodial ridge. Anterior neurosetae similar to the notosetae but posterior neurosetae are of two types, one or two inferior simple acicular setae, which are short, stout and blunt-tipped, and two or three crenulate setae, which become progressively shortened posteriorly. Pygidium simple with a small terminal slit. Not 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
