49 3 



ANTHODISCUS. 



GENUS 160. ANTHODISCUS, Grove and Sturt, 1887. 



Fig. 240. A nlhodiscus floreatus. 



Valve with numerous marginal compartments, separated by 

 septiform depressions ; umbilicus rounded, hyaline. Intermediate 

 portion finely punctate, with puncta radiating, interrupted at a certain 

 distance by blank spaces. 



A single species. 



A.floreatus Gr. and St., fossil in the Oamaru deposit. Figure 240 repro- 

 duces my photograph of this beautiful form. 



GENUS 161. ACTINODICTYON PANT, 1889. 



Valve with unequal 

 compartments; the elevated 

 compartments very narrow, 

 terminated by a process ; 

 depressed compartments 

 broad, reticulate, triangu- 

 lar, interrupted at the base 

 by a short elevation elonga- 

 ted into the hyaline umbi- 

 lical portion. 



Two species both fossil 

 from Ananino, Russia, A. 

 Fio . Weissflo^ii Pant., and A. 



Actinodictyon antiquorum. antiquoriim Pant. (fig. 24 1 ) 



photographed from the author's specimens. 



