Explanation of Plate II 



Hemiaster lacunosus sp. nov., page 10. 



Figs. 1-4. Dorsal, ventral, posterior and lateral views of B, one of the 

 type specimens. Xi. 



Fig. 5. Apical system greatly enlarged, g. genital plates, m. madreporite. 

 r. radial plates. 



Fig. 6. Portion of the anterior petal where it joins the apical system, 

 greatly enlarged. 



Fig. 7. Several plates of the right anterior petal, greatly enlarged. 



Figs. 8, 9. Top and side views of a tubercle, greatly enlarged. 





