Wakd. — Nectonema. 



PLATE I. 



Fig. 1. Male Nectonema, natural size. The bristles are so minute that they could 

 not be represented in proper proportions. Free hand drawing. 



Fig. 1". Anterior end of the same to show torsion of the body. Somewhat dia- 

 grammatic. 



Fig. 2. Dorsal view of anterior end of living animal. X 32. 



Fig. 3. Lateral view of anterior portion of living animal. Drawn by A. Agassiz, 

 August 5, 187L 



Fig. 4. Posterior portion of male. Drawn from specimen cleared in clove oil. 

 Simple microscope. X 7. 



Fig. 5. Posterior portion of female discharging eggs. Drawn from specimen 

 cleared in clove oil. Simple microscope. X 7. 



Fig. 6. Lateral aspect of central part of body. Drawn by A. Agassiz, August 2, 

 1877. 



Fig. 7. Ventral aspect of body. Drawn from living animal, and afterwards re- 

 duced one half. 1. A. X V' 



Fig. 8. Right half of anterior portion of the body drawn from a transparent object 

 in clove oil, and represented as though the near (left) half of the body 

 had been removed. 1. A. X 48. 



Fig. 9. End of body of male viewed as a transparent object in clove oil. 2. a*. 

 X17. 



Fig. 10. End of body of female viewed as a transparent object in clove oil. 2. A. 

 X 50. 



Fig. 11. Cross section from centre of body of male. Kleinenberg's haematoxylin. 

 2. A. X 98. 



