Arenicola loveni 



103 



N.GR 



PR. 



AKENICOLA LOVENI Kinberg, emend. 



Plate III; Plate IV, Fig. 11. 



Kinberg, Ofvers. Kongl. Vet.-Akad. Forhandl., 1866 (1867), p. 355 (Port Natal, 

 Durban) ; Eug. Eesa, Zool., vii, Annul. (1910), p. 73, t. xxix, 1. 



Ashworth, Arkiv for Zool., vii (1910), no. 5, 1 pi. (Saldanha Bay) ; Ann. 

 S. Afr. Mus., xi (1911), p. 1, pi. i (False Bay). 



Fauvel, Mem. Soc. Nation. Sci. Nat. Math., Cherbourg, xxxi (1899), p. 179. 



Caudate 1 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 prostomiuin is large, the smaller 

 lateral lobes are of almost uni- 

 form 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 

 prebranchial segments are long 

 dorso-ventrally and almost reach 

 the mid- ventral line ; each noto- 

 podial seta bears numerous 

 finely-toothed crests or " Sage- 

 blatter" at regular intervals 

 along the distal third of its 



Fig. 43. Arenicola loceni, from Saldanha Bay. 

 Shaft, and this part Of the Seta Anterior end, dorsal aspect. PR. Prostomium ; 



PER. Peristomium ; N.GR. Nuchal groove ; A.B.h. 

 presents a well-marked trans- Achaetous body-segment; CH.SEG.I First chaeti- 



lerous segment. 



verse striation ; 2 five pairs of 



nephridia, which open on the fifth to the ninth segments ; one 

 pair of oesophageal glands ; two enormous septal pouches which 

 pass through apertures in the second septum and terminate imme- 

 diately in front of the third septum; a pair of closed statocysts, 

 each containing a single large secreted statolith. 



HISTORICAL ACCOUNT. The species Arenicola loveni, which was 

 founded on a specimen collected at Port Natal, near Durban, was 

 defined by Kinberg in the following terms : " Scgmentum buccale 



1 Worthy of note is the very large number of tail segments in this species ; 

 in three specimens there were respectively 175, 186 and 205 septa in the tail, 

 indicating as many segments. 



2 See Fig. 11, p. 44. Crotchets are shown in Fig. 27, p. 56, 



A.B.S. 



CH.SEG! 



