38 



On the Occurrence of Arenicola Loveni, Kinberg„ 

 on the Coast of South Australia. 



By J. H. Ash worth, D.Sc, Lecturer in Invertebrate 

 Zoology in the University of Edinburgh. 



(Communicated by Edgar R. Waite, F.L.S.) 

 [Read May 11, 1916.] 



By the courtesy of Mr. Edgar R. Waite I was afforded 

 facilities during the early part of August, 1914, for exam- 

 ining the annelids in the collection of the South Australian 

 Museum, Adelaide. Among the unnamed material were two- 

 bottles containing specimens of Arenicola from the coast of 

 South Australia, and these have recently been sent to me for 

 examination. The specimens prove to belong to the species. 

 ^4. loveni, Kinberg, hitherto recorded only from three locali- 

 ties on the coast of South Africa, and a short account of their 

 chief features is given. 



Arenicola loveni, Kinberg, emend . Ashworth. 



Kinberg, J. G. H. : Gfvers. Kbngl. Vet.-Akad. ForhandL, 1866 

 (1867), p. 355; Eugenies Resa, Zool., vii., Annulata (1910), p. 73: 

 taf. xxix., fig. 1. 



Ashworth, J. H. : Arkiv. for Zool., vii. (1910), No. 5, 1 pi.; 

 Annals S. African Mus., xi. (1911), p. 1, pi. i. ; Cat. Chaetopoila . 

 Brit. Mus., i., Arenicolidae (1912), p. 103, pis. iii. and iv., fig. 11. 



The characters of the species are: — Caudate Arenicola 

 with nineteen chaetiferous segments : thirteen pairs of gills,., 

 the first gill on the seventh segment, gills large and pinnate : 

 the median lobe of the prostomium is large, the smaller lateral 

 lobes are of almost uniform width, that is, they are not dilated 

 or lobate at their anterior ends ; neuropodia are clearly visible 

 in each segment, those of the branchial and of the two pre- 

 branchial segments are long dorso-ventrally and almost reach 

 the mid-ventral line; five pairs of nephridia, which open on 

 the fifth to the ninth segments ; one pair of oesophageal 

 glands ; two very large septal pouches, which pass through 

 apertures in the second septum and terminate immediately in- 

 front of the third septum ; a pair of closed statocysts, each 

 containing a single large secreted statolith. (^ 



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(1) A description of these anatomical features is given in the 

 writer's publications cited above. 



