THE FORAMINIFERA 



ORDER Lituolidea. 



This order consists of arenaceous forms which are "isomorphic" 

 with genera belonging to several of the other orders; and by 

 many authors the order is broken up, and its genera associated 



10 



Fio. 19. 



Haliphysema tumanowiczii. 10, 

 part of the protoplasm stained to 

 show the nuclei, n ; 11, living speci- 

 men with expanded pseudopodia. 

 (From Lankester, Art. Protozoa, 

 Encycl. Britannica, Fig. x.) 



with the calcareous forms which they resemble. In some cases 

 (e.g. Cornuspira, Nodosaria, Rotalia) the latter are, as will appear 

 below, dimorphic, so that we should expect their " isomorphs " to 

 be so likewise ; but though this is very probably the case, I am 

 aware of no direct evidence on the matter. 



A process of reproduction is recorded by Schaudinn (42) in 

 Ammodiscus gordialis, P. and J. The protoplasm divides within 

 the parent test into some 50-80 young, which become invested 



