PLATE 13 



Fig. 1 Porella plana, young zooeeia at margin of zoarium. 



Fig. 2 Smittina reduplicata n.sp., young infertile zooeeia showing beginning 

 of secondary calcification. 



Fig. 3 The same, detail of aperture in high secondary calcification. 



Fig. 4 Schizmopora canaliculata, details of zooeeia. 



Fig. 5 The same, habit sketch. 



Fig. 6 Rippodiplosia reticulatopunctaia. 



Fig. 7 Smittina novanglia n.sp., secondary calcification. 



Fig. 8 The same, outline sketch showing relations of zooeeia to the aperture 

 and ooecium (Eogick). 



Fig. 9 Smittina beUa, secondary classification showing relations of zooeeia 

 to aperture and ooecia. A portion of the secondary calcification is broken away 

 on the left side showing a part of the primary ooecial wall with large pore 

 (Eogick). 



380 



