PLATE 45. 



PORODISCIDA. 



Diam. Page 

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



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



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



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



Lateral view, from the edge. 



Fig. 5. Hagiastrum buddhee, 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 zooxanthellae. 

 The endoplasm is radially striped. 



Fig. 7. Tesserastrum democriti, n. sp., . 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 



