ON SOME SOUTH PACIFIC NEMERTINES COLLECTED BY DR WILLEY. 579 



ganglia which lie outside and above the dorsal commissure and supply the head slits, 

 being also well marked in this specimen. I have, however, been unable to discover the 

 eyes mentioned by Burger. The following points may now be added to the previous 

 description. 



The head glands are numerous, but fine and scattered. They do not reach to the 

 brain. The excretory system extends to the posterior limit of the mouth region. The 

 tubules reach up from the level of the nerve cords to the proboscis sheath. They com- 

 municate with the exterior by a number of large ducts on each side. The blood 

 vessels in this region are exceedingly minute. The head slits reach almost to the brain. 



The species occurred in holes in coral stone and fixed itself in cavities of the stone 

 by rendering itself extremely varicose (Fig. 46). 



11. Lineus, sp. PI. LXI. Fig. 45. 



This species has only reached me in the form of a coloured sketch. It was 

 found coiled up inside coral stone at Lifu. In length it measured about 8 cm. The 

 colour was dark green, the tip of the head being white. There was also a white 

 w-shaped line on the head. The green of the body was relieved by 41 white trans- 

 verse stripes. Several eyes occur on the outer sides of the green patch at the tip 

 of the head (Fig. 45). In general appearance this worm greatly resembles L. geni- 

 culatus, but differs from it, (1) in its smaller size, (2) in the greater number of the 

 white bands, (3) in the absence of any red colouration round the head slits, (4) in the 

 eyes not being placed on the w-shaped white band. 



12. Langia, sp. PI. LXI. Fig. 4S. 



The posterior end of a fragment belonging to this genus was preserved. This 

 fragment measured about 8 cm. in length and 5 mm. across at its broadest part. The 

 small tail was present. The whole of the worm in front of the intestinal region was 

 lost. The colour was a pale reddish brown, the tail being quite white. The worm may 

 possibly be identical with the L. ohockinna of Joubin (7), in spite of the fact that his 

 species had no tail. That may very easily have been broken off". Fig. 48 shews a 

 transverse section of the worm. It was found in Gavutu, New Florida. 



w. V. 



