26 



ZOOLOGY. 



ber, measures about one fifth of an inch in diameter. Most 

 of our native species are much more minute. The Eozoon, 

 so-called, is supposed by some to be a Foraminifer, but 

 others regard it as more probably inorganic, and simply a. 



Pig. 15. B, Oollot-phiKra xpi- 

 nosa. with projecting conical 

 points, containing little sphe- 

 roids, which pass into monad- 

 like bodies 0. D, probably an 

 early stage of C. A, & young 

 capsule of C. Biixleyi Miiller. 

 After Cienkowski. 



Fig. W.ActinospfuKrium. a, amor- 

 eel of food drawn into the cortical layer 

 b ; c, central parenchymatous mass of 

 the body ; d, some balls of food-stuff in 

 the latter; e, pseudopodia of the cortical 

 layer. After Gegenbaur. 



Fig. 17. Heliophrys rariabilig. A sun 

 animalcule, showing the pseudopoda 

 nuclei, and vacuoles. From Macallister, 



mineral. Undoubted Foraminifera occur in the Silurian 

 formation, while large masses of carboniferous and cre- 

 taceous rocks are formed by their shells. 



Order 2. Radiolaria. These "Rhizopods have the general 

 structure of Amoebae, but secrete beautiful silicious shells, 



