574 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 53 



Phidolopora pacifica (Robertson), zooecium with ovicell and 

 large frontal avicularium. 



The same, zooecium and ovicell from another part of the 

 same colony. 



Lepraliella contigua (Smitt), old zooecium with ovicell par- 

 tially covered by adjoining zooecia. 



The same, young marginal zooecium showing spines, form 

 of aperture and developing avicularian chamber. 

 Lepraliella bispina (O'Donoghue), young zooecium with 

 spines, aperture and developing avicularian chamber. 

 The same, somewhat older, with frontal avicularium. 

 The same, with ovicell partially covered by adjoining 

 zooecia. 



Fig. 8. Reteporellina denticulata gracilis new variety, adult zoo- 

 ecium with ovicell, labial avicularium and ovate frontal 

 avicularium. 



Fig. 9. The same, young zooecium. 



Fig. 10. The same, dorsal zooeciule (kenozooecium) with ovate 

 avicularium. 



Fig. 11. Reteporellina bilabiata new species, adult zooecium with ovi- 

 cell, large pointed frontal avicularium and high lateral oral 

 flanges. 



Fig. 12. The same, young zooecium at tip of branch. 



Fig. 13. The same, dorsal zooeciule with pointed avicularium. 



Fig. 14. The same, habit sketch showing form of branching. 



