46 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



PAGE 



Fig. 7. Cribrilina crassicoUis, new species 15 



Surface of the free cylindrical zoarium. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 8. Stanicnocclla fusiforniis, new species 5 



The free cylindrical zoarium celluliferous on all sides, exhibiting 



the fusiform zooecia and the orbicular avicularium. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 9. M onbraniporidra asymmctrica, new species 4 



Ordinary and ovicelled zooecia of the bilamellar zoarium. The 

 spiniform process on one side of the zooecium and the large 

 transverse avicularium are shown. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 10. Acanthodesia quadrilatcra, new species 2 



The delicate subcylindrical zoarium of elongated rectangular 



zooecia with short spicules indenting the opesium. 

 Balcombian beds at Muddy Creek, Victoria. 

 Figs, i i, 12. Otionclla circiimdata, new species 3 



11. Lateral view of a small conical zoarium with large auriform 

 primoserial vibracula. 



12. Base of the same with radial lines and elliptical cavities each 

 containing an avicularium around the periphery. 



Balcombian beds at Muddy Creek, Victoria. 



Plate 2 



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



Fig. I. Ramphonotus (?) lamcllosus, new species 6 



The bilamellar zoarium with normal and ovicelled zooecia and the 

 narrow, transverse, triangular avicularium on the proximal 

 part of the cryptocyst. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 2. Arachnopusia linearis, new species 8 



The free bilamellar zoarium showing the aperture with its recti- 

 linear proximal border and the perforated zooecial frontal. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 3. Trevwpora orbiculata, new species 7 



Portion of the unilamellar zoarium illustrating the orbicular 

 zooecia, the two distal spines and the large lateral avicularium 

 with a small one opposite it. 

 Balcombian beds at Muddy Creek, Victoria. 

 Figs. 4, 5. Trcmopora staiiiinis, new species 7 



4. Frontal of a unilamellar zoarial fragment exhibiting ovicells 

 and some zooecia with the large frontal spine preserved. 



5. Dorsal of the same zoarium showing the fenestrae separating 

 the connecting tubes, and the radicular pores. 



Balcombian beds at Muddy Creek, Victoria. f 



Fig. 6. Rcctonychocella divwrphocella, new species 9 



Surface of the bilamellar colony with both ogival and membrani- 



poroid cells. 

 Balcombian beds at Muddy Creek, Victoria. 



