ON SOME SOUTH PACIFIC NEMERTINES COLLECTED BY DR WILLEY. 583 



Fig. 26. D. lifuensis. Shewing anterior end (dorsal surface a and ventral surface 6) after 

 sketches made by Dr Willey from life. The longitudinal lines at the anterior extremity were 

 deep blue, the rest of the shaded portion pale red, the unshaded portion white. 26 c shews the 

 " tail." 



Fig. 27. D. lifuensis. Sketch of anterior end as seen when cleared in xylol. 



Fig. 28. Eupolia rugosa. Section through brain region. Owing partly to the great state 

 of contraction, and partly to the strong ventral curvature following tixation, the proboscis sheath 

 is cut three times and a portion of the mid-gut has come to occupy a position just dorsal to 

 tlie brain. For the same reasons a portion of the ganglion cells of the lateral cord is also 

 seen in the section, x 45. 



PLATE LX. 



Fig. 29. E. rugosa. Section through anterior edge of proboscis pore shewing the openings 

 of the largely developed head glands, x 45. 



Fig. 30. E. rugosa. Section through cerebral organ. Beneath it is seen the lateral nerve 

 cord passing outwards. * denotes the small green bodies lying in the glandular part of the 

 organ (vide Text, p. 575). 



Fig. 31. E. rugosa. Shewing animal preserved. Natural size. 



Fig. 32. Eupolia hemprichi. Section through cerebral organ shewing ovum lying dorsal 

 to it on one side. 



Fig. 33. Eupolia qainquelineata. (a) Dorsal surface of anterior end ; (b) ventral surface, 

 the shaded portion round the black lines being of a pinkish hue in life ; (o) shews arrangement 

 of lines dorsally at point of injury (?) about half-way down the animal ; (d) is ventral surface 

 of the same. All x | (about.) From sketches made by Dr Willey during life. 



Fig. 34. Eupolia multiporata. Anterior end. x 4. 



Fig. 35. E. midtiporata. Reconstruction shewing position and arrangement of excretory 

 system. The duct marked * was double, one part opening more dorsally than the other. 



Fig. 36. E. multiporata. Section through portion of head anterior to head furrow, x 60. 



Fig. 37. E. multiporata. Section through cerebral region, x 60. 



Fig. 38. E. multiporata. Section through posterior brain region, x 60. 



Fig. 39. E. multiporata. Section through skin in mid-gut region shewing the broad bases 

 of the deeper glands, x 160. 



PLATE LXI. 



Fig. 40. E. multiporata. Section through mid-gut region. One of the excretory ducts is 

 seen passing to the exterior, x 60. 



Fig. 41. Lineus australis. Sketch of dorsal («) and ventral (6) surfaces of head end as 

 seen after clearing in xylol, x about 10. 



