1903] On the Nemerteans of Norway. 27 



shortly behind the posterior edge of the mouth (PL II, fig. 22) 

 and extend ventral as well as dorsal to the level of the nervous 

 sidestems. A single excretory pore is present on either side. 

 This opens on the upper and outer border of the elongated 

 head slit (Pl. I, fig. 2). 



The gonads were nearly ripe in the specimens obtained but no ducts 

 were formed. 



The brain is fairly well developed and the ventral ganglion is almost 

 as large as the dorsal. The cerebral organ is large and 

 rounded in shape. The median dorsal nerve is indistinet. 

 The head slits are comparatively shallow, reaching only halfway 

 to the brain in the cerebral region. The depth of each of 

 them in this region is about 1 /n of the transverse diameter of 

 the head as seen in section. The head slits reach backwards 

 as far as the intestinal region. The frontal organ is small. 

 Head glands and eyea are both absent. 



The most interesting ferture about this species lies in 

 its peculiar distribution. Hubrechfs specimens were dredged 

 in 69 fathoms off Marion Island, some 1000 miles south of 

 the Cape of Good Hope. So remarkable a species could hardly 

 have escaped detection if it occurred in any intermediate local- 

 ities which have been explored. Besides it is apparently not 

 uncommon where it occurs. So that C. longifissus is a shallow 

 water species hitherto found only in two localities separated 

 by over 100 degrees of longitude. This curious distribution 

 is paralleled by that of another Nemertean, Drepanophorus crassus, 

 which occurs in the Mediterranean and has also been recorded 

 by Hubrecht from Kerguelen Island. 



Metanemertini. 



18. JEunemertes nordgaardi n. sp. 



Localities a) Saltenfjord, south of Bodø; from a muddy bottom in 

 a depth of 200 metres. Temperature 6' 5° C, salinity 

 36' 06 °/o. 

 b) Bålstad in Lofoten; from a depth of 150 metres. 

 Temperature 4° C, salinity 34' 52 % 

 Occurrence. One complete specimen from each of the above loca- 

 lities. 



