PLATE IV. 



[Nummulitic Series.) 



Pigure 1. Amblypygus altus, Duncan and Sladen (page 16). A large specimen, side view, 

 natural size. 



2. The same, abactinal view, natural size. 



3. The same, actinal view, natural size. 



4. Amblypygus pbntagonalis, Duncan and Sladen (page 18). The test, side view, 



natural size. 



5. Abactinal view of the same, natural size. 



6. Peristomial region of a specimen, natural size. 



7. Marginal ornamentation, magnified. 



8. Ornamentation near the apex, seen obliquely, magnified.^' 



9. Poriferous zone and interporiferous area, magnified. 



10. Poriferous zone and part of interporiferous area of an ambulacrum near the margin, 



magnified. 



11. The apical system, magnified. 



