PLATE 116. 



Medusettida et Circoporida. 



Diam. Page 



Fig. 1. Polypetta mammillata, n. sp., . . . . x 500 1677 



In the upper part of the figure the dentate proboscis. 



Fig. la. Vertical section through the shell- wall, showing two of the 



hollow alveoles, opening on its inside, . . X 1000 



Fig. 2. Polypetta tabulata, n. sp., . . . . x 500 1677 



In the upper part of the figure the dentate proboscis. 

 Fig. 2a. A piece of the shell, seen from the surface, with the triangu- 

 lar plates, ... . . .X 1000 



Fig. 2b. Vertical section through the shell- wall, with an alveole, . x 1000 



Fig. 3. Circostephanus coronarius, n. sp., . . . , x 150' 1699 



The polyhedral shell exhibits in its wall the small tangential needles. 



The radial spines are partly broken off. The mouth of the shell, 



surrounded by eight short conical teeth, is visible on the left side 



of the figure. 



Fig. 3 a. The mouth of the shell, seen in profile, with eight conical 



spinulate teeth, . . . . . X 400 



Fig. 3b. The base of a radial spine broken off, to show the corona of 



(five or six) basal pores, . . . . X 400 



