EXPLANATION OF PLATE LXXVIII. 



POLY/.OA. 



Fig. 9. Hiantopora perforata, Mapl. — x 50. 

 ,, 10a Celhponi doliaris, Mapl. (viewed from above)— x 50. 

 ,, 10b. ,, ,, (side view)— x 50. 



,, 11. Zeuglopora lanceolata, Mapl. — x 50. 

 ,, 12. Ltkyt hopora avicularis, Mapl. — x 50. 



