PLATE 45. 



PORODISCIDA, 



Diam. Page 



Fig. 1. Stauralastrum rhopalophorum, n. sp., . . x 200 541 



Fig. 2. Dicranastrum comutum, n. sp., . . . . x 200 551 



Fig. 3. Hagiastrurn mosis, n. sp., . . . . . x 100 543 



Fig. 4. Hagiastrurn mosis, n. sp., . . . . x 50 543 

 Lateral view, from the edge. 



Fig. 5. Hagiastrurn buddhce, n. sp./ . '". . . x 50 542 



Fig. 6. Stauralastrum cruciforme, n. sp. (in glycerine), . . x 500 540 



The central capsule contains a large central nucleus with nucleolus, and is 

 surrounded by the jelly calymma and numerous small zooxanthellse. 

 The endoplasm is radially striped. 



Fig. 7. Tesserastrum dernocriti, n. sp. 5 . . . . x 100 548 



Fig. 8. Tesserastrum straussii, n. sp., . . . x 500 547 



Fig. 9. Tesserastrum brunonis, n. sp., . . . . x 200 548 

 Disk seen from the edge. 



Fig. 10. Amphirhopalum echinatum, n. sp., . . . . x 300 522 



Fig. 11. Amphicraspedum maclagganium, n. sp., . . . x 100 523 



Fig. 12. Amphicraspedum wyvilleanum, n. sp., . . x 300 523 



