NO. 9 TERTIARY BRYOZOA CANU AND BASSLER 45 



Family ORBITULIPORIDAE Canu and Bassler, 1923 



STICHOPORUSTA Stoliczka, 1861 



STICHOPORINA (?) PARVICAPITATA, n. sp. 



Plate 8, fig. II 



Description. — The small fragments of this species in our collection 

 are incomplete, and it is difficult to classify them. The ovicell which 

 ought to be closed by the operculum, is small and analogous to that 

 of Batopora and OrhitiiUpom. We do not know if there was a central 

 pit. The zooecial walls are olocystal with two or three pores at the 

 base. On the interior face the zooecia are hexagonal, and without 

 doubt this species is indeed one of the Orbituliporidae. 



Occurrence. — Balcombian beds at Muddy Creek, Victoria. 



Cotypes.—U.S.^M. no. 85882. 



EXPLANATION OF PLATES 



Plate i 



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



PAGE 



Fig. I. Amphiblestrum grandc, new species 6 



Ovicelled fragment of a unilamellar zoarium illustrating the large 

 size of the cells, the granular gymnocyst and the apparent ab- 

 sence of avicularia. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 2. Membranipora areolata, new species 3 



Portion of the bilamellar zoarium shoAving the distal transverse 



avicularia and the polygonal interopesial spaces. 

 Janjukian, Aire Coastal beds, Victoria. 



Fig. 3. Acanthodesia regnlaris, new species 2 



Portion of the free, subcylindrical branch exhibiting the regular 



form of the zooecia. 

 Janjukian beds at Anticline Creek, Dartmoor, Victoria. 



Fig. 4. Vinculana giganica, new species . 3 



Portion of the rodlike zoarium composed of unusually large 

 zooecia. 

 Janjukian beds at Anticline Creek, Dartmoor, Victoria. 



Fig. 5. AUantopora confims, new species 6 



A normal incrusting colony with zooecia bearing a large gymno- 

 cyst. 

 Balcombian beds at Muddy Creek, Victoria. 



Fig. 6. FloridincUa auslraliensis, new species 9 



The narrow bilamellar zoarium exhibiting the characteristic con- 

 dyles in the opesium. 

 Balcombian beds at Muddy Creek, Victoria. 



