PLATE VII. 



Figure 1. Cyphosoma abnormale, Duncan and Sladen (page 33). The side view of a large 

 specimen, natural size. 



2. The abactinal surface, slightly magnified. 



3. A small specimen, magnified 2 diameters. 



4. An ambulacrum of the large specimen (Fig. 1), magnified. 



5. Interradial tubercles and pores of the smaller specimen (Figure 3), near the ambitus, 



magnified. 



6. The poriferous zone and the adjoining ambulacral and interradial plates near the 



peristome of the larger specimen, magnified. 



7. An interradial tubercle and plate of the large specimen, magnified. 



8. A young specimen, natural size. 



9. The poriferous zone and adjoining ambulacral and interradial plates of Figure 8, 



magnified. 



