26 ZOOLOGY. 



her, 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 



Kg. 15. s, OoOotpkara sjri- 

 nosa. with projecting conical 

 points, containing little sphe- 

 roids, which pass into monad- 

 like bodie* C. D, probahly an, 

 early stage of C. A, a young 

 capsule of C. Huxleyi Miiller. 

 After Cicnko\\>ki. 



Fig. 16. Acfinosphcerinm. , a mor- 

 sel 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, psendopodia of the cortical 

 layer. After Gegenbaur. 



Fig. 17.ffeliophrysmriabUi8. A sun- 

 animalcule, showing the pscudopods, 

 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 



