4^ 



species of Aracocia** (A. heteroclueta) is apparently a Liinihri- 

 conereis with a different dental apparatus. 



It is probable that this species occurs at the Canaries ("Langer- 

 hans§^, so that the step to South Africa is broken. The Arabella 

 opaliiia, of VerrillJ is a very closely allied, if not identical 

 species, and this has also been found at Porto Rico, by Tread- 

 well. ft The Arabella maculosa, n.s., of Verrill,$t from Flatts 

 Inlet, Bermudas, presents no feature other than what might 

 occur in a variety of this almost cosmopolitan form. 



Further, the Aracoda cacnilea, Schmarda, as described by 

 Ehlers, would not seem to differ in any essential particular 

 from the British representatives, for the presence of a third 

 narrow appendage to the maxillae is of comparatively little 

 moment. This third appendage occurs in the same species 

 from Japan (Kada Bay). The view here suggested is the more 

 likely, from the fact of the very wide distribution of the species. 

 A form which stretches from Britain to Japan on the one hand, 

 and from South Africa to Juan Fernandez on the other, should 

 not be too rigidly judged, according to artificial standards of 

 distinction. 



LUMBRICONEREIS TETRAURUS, Schmarda, 1861. 



1861. Notocirnis teiraurus, Schmarda, Neue wirb. Th., I. ij., 

 p. 117. 



1885. LiiDibricoiicicis Pcittgreivi, Mcintosh, Annel. "Chal- 

 lenger," p. 239, PI. xxxvi., figs. 7, 8, 9, PI. xviirt., figs. 11 

 —14. 



1901. LiDiibricoiiL'iris tctranra, Ehlers. Polych. Magell. u. 

 Chilen., p. 137, Taf. xvii., figs, i — 10. 



Found between tide-marks at St. James, False Bay. 



The head of this species forms a blunt cone with one or two 

 longitudinal grooves dorsally, and a close series ventrally. 

 Posteriorly is a median band, with a depression on each side, 

 where it joins the first segment. 



An elongated species of the usual shape, and the tail is 

 terminated by four short caudal cirri, the inferior being the 

 longer. The colour is brownish, with fine bluish iridescence — 

 especially anteriorly. 



** Grubef adopted Schmarda's genus Aracoda for those which had the bases 

 of the maxilke toothed, and Ehlers* followed. Considerable confusion, 

 however, exists as to the toothed condition of the maxilke, for the teeth 

 are often hidden — from the nature of the edge of the maxilhe. 

 Ann. Semper., p. 175. 

 Op. cit., p. III. 



§ Langerhans, Nova Acta. Bd. xlii., No. 3, p. 112, Taf. li.. lig. iS, 

 II Repoit Invert. Vineyard Sound, 1S74, p. 594, figs. 6g and 70. 

 ft Bullet. U.S. Fish Com. for 1900, p. 199. 

 XX Trans. Conn. Acad. Arts and Sc. \., 1900, p. 651. 



