584 ON SOME SOUTH PACIFIC NEJIERTINES COLLECTED BY DR WILLEY. 



Fig. 42. L. australis. Section through commencement of intestinal region shewing the 

 relative thickness of the various elements of the body wall, x 60. 



Fig. 43. L. australis. a^". Sections through brain shewing arrangement of vascular 

 system in this region. * in / indicates the position the excretory tubules occupy a few sections 

 more posteriorly. 



Fig. 44. Z. australis. Section through skin shelving thickness of gelatinous layer of the 

 cutis. X 160. 



Fig. 45. Lineus sp. 2 After a sketch made of the living animal by Dr Willey. The 

 ground colour is dark green, and is broken by 41 transverse bands, and by an oj-shaped line 

 on the head. Natural size. 



Fig. 46. Lineus albovittatus. Shewing the varicosity produced at the posterior end by 

 which the animal fixes itself in holes in coral rock. After a sketch from life by Dr Willey. 

 Much reduced. 



Fig. 47. L. albovittatus. Enlarged -^-iew of anterior end of animal when alive ; after 

 sketch by Dr Willey. 



Fig. 48. Langia sp. ? Transverse section, x 20. 



