48 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



PAGE 



Fig. II. Oinoiosia clongata, new species 14 



A bilamellar zoarium showing the elongate zooecia of two kinds — 



normal and special. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 12. Cribrilina terminafn coronata, new variety 16 



View of unilamellar zoarium illustrating small avicularia on the 



peristome. 

 Balcombian beds at Muddy Creek, Victoria. 



Plate 4 

 (All illustrations on this plate are magnified, X 20) 



PAGE 



Fig. I. Macropora clarkci attcnnata, new variety 12 



Portion of the bilamellar zoarium showing the characteristic 



separating furrow. 

 Janjukian beds at Flinders, Victoria. 



Fig. 2. Gigantopora hystrix, new species 20 



Surface of the cylindrical zoarium showing the short, broad 



zooecia and salient spines separating the tremopores. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 3. Cellaria orbicularia, new species 13 



Portion of an ovicelled segment exhibiting the orbicular opesium. 

 Janjukian beds at Anticline Creek, Dartmoor, Victoria. 



Fig. 4. Cellaria attenuata, new species 13 



Extremity of a segment showing a joint of articulation at the 

 end, a large broad avicularian zooecium, and the orifices of the 

 ovicells. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 5. Pachythccella tmifasciata, new species 17 



Celluliferous side of the unilamellar bifurcated zoarium showing 



the large orbicular ascopore. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 6 Gigantopora hexagonalis, new species 20 



Several zooecia of the unilamellar zoarium illustrating the coales- 

 cence of the beaks of the two large lateral avicularia above 

 the spiramen. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 7. Ellisinidra pyriformis, new species 5 



An example preserving the small hyperstomial ovicell. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 8. Pachythccella armata, new species 17 



Bilamellar zoarium with orbicular aperture, small ascopore and 



the frontal of the zooecia covered with small shallow pores. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 9. Petraliella (?) dcnticulata, new species 19 



Surface of the bilamellar zoarium showing the denticulated border 



of the peristomice. 

 Balcombian beds at Muddy Creek, Victoria, 



