EXPLANATION OF PLATE XXVI. 
ASTROCCENIA CONICA, 72. sf. (Mus. No. P 5946.) 
Fig. 1. A longitudinal section of type. 
Fig. 2. A transverse section of type. 
Fig. 3.. A fragment of corallum—type. 
PSEUDO-PERNA WILSONI, #. sf. (Mus. No. P 5945.) 
Fig. 4. Exterior view of left valve. 
Fig. 5. Interior view of left valve. 
