1933] On the Nemerteans of Norway. \\ 



muscle crosses in the nephridial region. The shape of the 

 head at once distimguishes it from the somewhat similarly 

 coloured C. théeli 1 ) and there are also structural differences. 

 The species with which C. amUgua would appear to have 

 the closest affinity is C. speeiosa, a Northern Pacific form re- 

 cently described by Coe. 2 ) It is very like it in external ap- 

 pearance and in general structure, whilst the extraordinarily 

 developed head glands distinguish these two species from all 

 other members of the genus except C. annulata. The chief 

 points of difference between the two species would appear to 

 be the larger size of C. speeiosa, the absence af external markings. 

 the lesser developement of the basement membrane. and the 

 presence of peculiar epithelial ingrowths 3 ) in the posterior 

 nephridial region. Traces of such ingrowths however oecur in 

 C. amhigua though they never quite manage to penetrate 

 the thick basement membrane. AVhether a side organ is pre- 

 sent in C. speeiosa Coe does not state. It is however in- 

 teresting to lind two such closely- related forms so widely 

 separated from a geographical stand point. 



2. Cariuella polymorpha (Reniee. 1804). 



Two young speeimens were dredged near Bergen in 1901. 



a) from Herlo fjord in 10 metres on a bottom of laminaria and 

 sand. 



b) from Oster fjord in about 100 metres on a rocky bottom. 



According to Buegee 4 ) it has previously been tåken in the 

 nei2'hbourhood of Bers-en bv Blochmann. 



3. Carinella linearis (Mc. Intosh. 1873). 



A single small specimen dredged from Oster fjord (near Bergen) 

 on rocky bottom in a depth of about 200 metres. In its anatomy 



T ) Bergexdal, Bergens Museums Aarbog 1902. P. 6. 



2 ) Coe. Proe. Washington Ac. Sc. 1901. P. 11. 



3 ) Coe.. loe. eit. Pl. X. fig. 1. 



4 ) Burger, loe. eit.. P. 5, 7. 



