66 



THE HISTORY OF CREATION. 



cases the whole skeleton consists of only one flinty star, and 

 is then generally composed of twenty staves, distributed 



and united in a 



according to definite mathematical laws 



Pig. 16. — Cyrtidosphaera ejhinoides, 400 times enlarged, c. Globular 

 central capsule, s. Basket-work of the perforated flinty shell, a. Radial 

 spikes, which radiate from the latter, p. The pseudo-feet radiating from 

 the mucous covering surrounding the central capsule. I. Yellow globular 

 cells, scattered between the latter, containing grains of stai-ch. 



common central point. The skeletons of other Radiolaria 

 ao-ain form symmetrical many-chambered structures, as in 

 the case of the Polythalamia. Perhaps no other group of 



