EXPLANATION OF PLATE I. 



Pheronema rajihautis. F. E. Sell. 



Fig. 1. Lateral view of a specimen from the Andamans. Nat. size. 

 After a photograph taken by Dr. von Mahrenthal. 



Fig. 2. The same specimen seen from above. Nat. size. Aftpr a photo- 

 graph taken by Dr. von Mahrenthal. 



Fig. 3. Macramphidiscs of the skin. x 300. 



Figs. 4, 5 and 6. Micramphidiscs of the skin. x 300. 



Fig. 7. Large pinule of the outer skin. x 300. 



Fig. 8. Low pinule of the outer skin. x 300. 



Fig. 9. Micro-uncinate of the parenchyme. x 200. 



Fig. 10. Fragment of the central part of an uncinate. x 400. 



Fig. 11. Micro-oxyhexactine of the parenchyme. x 300. 



Fig. 12. Lower end of an anchor, x 800. 



Fig. 13. Upper end of a large uncinate. x 300. 



Fig. 14. Small marginal spicule. x 300. 



Fig. 15. Large pinule of the outer skin. x 300. 



Fig. 1 6. Larger parenchymal oxyhexactine. x 400. 



Fig. 17. Central part of a pentactine hypodermal. x 100. 



