PLATE VIII. 



Figure 1. Acanthechinus nodulosuSj Duncan and Sladen (page 34). The testj natural size. 



2. Ambulacral and interradial plates near the ambitus, magnified. 



3. A primary tubercle, magnified. 



4. EuRYPNEUsTES GRANDis, Duncau and Sladen (page 46). Fragment of the test, natural size. 



5. Ambulacral and interambulaeral plates, magnified. 



6. ^oLOPNEusTEs DE LoRioLi, Duucan and Sladen (page 48) . Actinal view of the specimen, 



natural size. 



7. Outline of the profile of the test. 



8. Ambulacral and interambulaeral plates, magnified. 



9. A portion near the peristome, showing the cuts, magnified. 



