PLATE XXII. 



Figure 1. Micropsis venustulAj Duncan and Sladen (page 119). Profile view of the test, 

 magnified x 3. 



2. Abactinal view of the test, natural size. 



3. Actinal view of the test, showing peristome, natural size. 



4. Abactinal view of the test of a pentagonal variety, natural size. 



5. Apical disk, magnified x 7. 



6. Ambulacral and interambulacral plates, magnified. 



7. Diagram of the poriferous plates of the ambulacral plate. 



8. Cyphosoma macrostoMa, Duncan and Sladen (page 116). Profile view of the test, 



natural size. 



9. Actinal view of the test showing peristome, natural size. 



10. Ambulacral and interambulacral plates, magnified. 



11. CYPaosoMA UNDATUM, Duucan and Sladen (page 117). Outline of the profile contour 



of the test, natural size. 



12. Ambulacral and interambulacral plates, magnified. 



13. Temnechinus Rousseaui, d'Archiac, sp. (page 122) *! Profile view of the test, 



magnified x 2. 



14. Ambulacral and interambulacral plates, magnified. 



* This species is probably included by accident in the Khirthar series. 



