INDEX TO PLATE IX. 



Fig. 1. — Venillia Blakei ; Stearns. General aspect; one-twelfth natural 

 size ; from Dr. Blake's specimens. 



YiG. 2. — Section of Polypiferous portion of one of the lari^est and n!ost 

 crowded specimens. Natural size. 



Fig. 3. — Cross-section through Polypiferous part ; n, principal longitudinal 

 canal ; b, axis. 



Fig. 4. — Cross-section through basal part ; a, canal ; b, axis. 



Fig. 5. — Section of Polypiferous portion of a smaller and less crowded 

 specimen, received from J. S. Lawson, Esq. Natural size. 



Fig 6. — Section of above ; (Fig. 5) showing chevron-like arrangement of 

 Polyp-rows, opposite the axial-side. Natural size. 



