. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. Per. ;⢠â ' AW Fig. 1.âArenicola loveni. Anterior end, dorsal as- pect. PR. Prostomium ; Per. Peristomium ; Nuchal {troove ; Achaetoug lx)dy-segnient; First chaetiferous X 6 Fi^'. 2.âA. pusilla. Anterior end, dorsal aspect ; showing the large and folded lateral lobes of the prostomium. exceeds 2 mm. in diameter, and, since it is liable to be retracted within the crescentic nuchal groove situated immediately behind it, is often seen with difficulty, and
. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. Per. ;⢠â ' AW Fig. 1.âArenicola loveni. Anterior end, dorsal as- pect. PR. Prostomium ; Per. Peristomium ; Nuchal {troove ; Achaetoug lx)dy-segnient; First chaetiferous X 6 Fi^'. 2.âA. pusilla. Anterior end, dorsal aspect ; showing the large and folded lateral lobes of the prostomium. exceeds 2 mm. in diameter, and, since it is liable to be retracted within the crescentic nuchal groove situated immediately behind it, is often seen with difficulty, and then only in part. The prostomium ' Fabricius (Fauna Groenl. (1780), p. 284), in describing Lumbricus paxiil- losus (= A. marina), mentioned the presence of a short, foliate, trifid " rostnim," and Savigny drew attention to this small, trilobed " caroncnle," but its nature was not understood thoroughly until Dr. Levinsen (1883) pointed out its homology with the head-lobe (prostomium) of Scalihregyna. I). 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
