ASHWORTH, AN ACCOUNT OF ARENICOLA LOVENI KTNBERG. 19 



lique muscle band, X. ^ Setae of first iiotopodium, N.^ Setal 

 sac of third notopodium with its protractor muscles, St. Stom- 

 ach. For further description see pp. 11 — 14. 

 Fig. 8. Section of a statocyst of a Saldanha specimen (see p. 15). 

 The epithelium, which forms the wall of tlie vesicle, is not 

 well preserved but several sense cells (S. C.) may be recog- 

 nised in it. Xote also the single large statolith and the strand 

 (Nv.) of nerve and connective tissue continuous with tlie 

 sheath of similar natiire which envelops the vesicle. X 110. 



Contents. 



Page 



Historical Accomit 1 



Occurence, Size, Colom- 3, 4, 5 



Prostomium 5 



Segmentation and Parapodia: Setae, Gills 5, 8. 10 



Internal Organs : Septa and muscles, Alimentary caual, Vascular 

 system, Nephridia, Gonads, Xervous system and sense 



organs 11 — 14 



Diagnosis of Arenicola loveni Kinbeeg 15 



Aftinities of Arenicola loveni Kinberg 16 



Description of Figures 18 



Tryckt den 10 november 1910. 



Uppsala 1910. Almqvist & Wiksells Boktryckeri-A.-B. 



