2 ARKIV FÖR ZOOLOGI. BAND 7. N:0 5. 



The species A. loveni is not mentioned in the literature, 

 so far as I am aware, from 1867 until 1888, when, in discuss- 

 ing the ecaudate species of Arenicola, Professor von Maren- 

 ZELLER 1 stated that these species may have a chaetigerous 

 segment behind the last branchiferous one and that similar 

 cases have been previously met with, for instance, A. loveni 

 Kbg. Judging from the short diagnosis, the only description 

 then available, 2 von Marenzeller remarked that A. loveni 

 seems to resemble A. marina, and that the validity of the 

 former species is doubtful. In 1899 Fauvel (loc. cit.) gave 

 a description of the figures of A. loveni on the unpublished 

 plate above mentioned. He pointed out that, as far as one 

 is able to judge by the figure of the worm, this species differs 

 from a large example of A. marina only in the presence of 

 a setigerous ring between the last branchial segment and the 

 caudal region. This setigerous ring is shown bearing, on each 

 side, a tuft of setae but no notopodial elevation. Fauvel 

 remarked that such a character in an Arenicola is so extra- 

 ordinary that one might ask if there had not been an error 

 of observation. In view of the insufficient information re- 

 garding this species he concluded that it was impossible to 

 decide whether A. loveni is a distinct species or should be 

 merged with A. marina.^ Gamble and Ashworth ^ placed 

 this among the species of Arenicola, which, being so shortly 

 and insufficiently described, must for all practical purposes 

 be ignored. 



The above account, which embodies the whole of the in- 

 formation hitherto available regarding A. loveni, shows that 

 the validity of this species and its position with regard to 

 other species of the genus are very uncertain. With a view 

 to the investigation of the characters and the determination 



^ Marenzeller, E. von. »Polychäten der Ångra Pequena-Bucht.» in: 

 Zool. Jahrb. Abth. Syst., Bd. III, pp. 14, 15, Jena, 1888. 



" VON Marenzeller had not access to a copy of the unpublished 

 plate. 



3 J. E. IvES (Proc. Acad. Xat. Se Philadelphia for 1890, p. 74, Phila- 

 delphia, 1891.) apparently considers A. loveni Kbg. to be a synonym of A. 

 marina, for in stating the range of distribution of A. marina he includes 

 South Africa. The only records of Arenicola from South Africa are those 

 of Kinberg (^4. loveni) and von Marenzeller {A. marina, from Ångra Pe- 

 quena) so that Ives' statement implies that he considers Kinberg's speci- 

 men to be an example of A. marina. 



* Gamble, F. W. and Ashworth, J. H. »The Anatomy & Classification 

 of the Arenicolidae . . .» in: Quart. Journ. Micr. Se, Vol. 43, p. 429, 1900. 



