16 K. C. Punnett. [No. 2 



shewn by the shallowness of the head slits and intestinal 

 diverticula, by the simple nature of the excretory system with 

 its dorsal tubules and singie pore at the posterior end, and 

 also by the lateral rhynchococlomic vascular tufts which recall 

 those found in Carinella 1 ). Further the „glandular zone" 2 ) 

 in the nephridial region is found also in the primitive Lineids 

 Zygeupolia and Micrella though hardly elsewhere in the group. 

 Taking all these features together it seems obvious that L. 

 niveus is a comparatively primitive member of the family, and 

 forms a connecting link between Zygeupolia and Micrella on 

 the one hand, and the more highly specialized Lineids on 

 the other. 



7. Lineus scandinaviensis n. sp. 



Locality. Jøkelfjord (branch of Kvænangen at 70° Lat.). From 100 

 metres off bottom of bluish-black mud. Temp. 1° C, Salinity 

 34.29 %. 



Oecurrenee. One complete specimen and fragments of several 

 others. 



External features. Somewhat elongated and cylindical in shape 

 after preservation. No caudicle. Colour after preservation 

 a uniform pale flesh. Not improbably the worm was reddish 

 or pink when alive. 



The body wall is stoutly built. In -the oesophageal region the outer 

 longitudinal layer is about 3 times the thickness of the circular 

 layer. The inner longitudinal layer is considerably thicker 

 than tmT circular. The epithelium rests on a fine basement 

 membrane. Beneath this there is a comparatively thick layer 

 of circular muscle fibrils. The cutis glands beneath are poorly 

 developed. 



The proboscis is thin and two layered. Muscle crosses are present 

 but are faint and difficult to distinguish. The proboscis sheath 

 does not reach to the hind end of the worm. Shortly after 

 the level where the intestinal pouches commence the rhyncho- 

 coelom becomes exceedingly reduced and at no very great 

 distance behind entirely disappears. 



J ) cf. Burger, Naples Monograph, Taf. 12, fig. 7. Tliese vessels are also 

 found in a few other Lineidae e. g. Cerébratulus marginatus 

 2 ) cf. Thompson, loe. cit. p. 665. 



