FORAMINIFEBA. 



)iO 



thrown out in all directions, is a type ; Rotalia veneta (Fig. 

 14) is another example. 



The Foraminifera are nucleated. Diplophrys multiplies 

 "by a " process of con- 

 iinuous binary fis- 

 .sion." Miliola gives 

 rise to small round, 

 sharply - defined bod- 

 ies, in calcareous 

 shells, -with one turn, 

 but no inner walls, 

 -and with pseudopo- 

 dia like those of the 

 -adult. Microgromia so- 

 ■cialis multiplies by zo- 

 ospores, which are oval, 

 •with two flagella ; or. 



Fig. 13.— A Foraminifer. Globigerina Imlloides, 

 magniiied 70 diameters. — Froia Macallister. 



other eases, the 

 young assume an actinophrys-like form, and move about by 

 4he aid of three or four more or less branched pointed pseudo- 

 pods (Hertwig). 

 \;'iild'/ / /■ A in some forms, 

 :iMW/ /,,/// as the fo&sil 



Numviulites, the 

 chambers are 

 numerous and 

 regular, the 



shells being flat 

 and consisting 

 of eight coils sit- 

 uated in the 

 same plane. A 

 recent species ot 

 Foraminifer 

 found at Borneo 

 measures more 

 than two inches 

 in diameter, while a common form on the Florida reefs, de- 

 voured in large quantities by the Holothuria, or sea-cucum- 



/ v 



Fig. 14. — Sotaiia. A Rhizopod, showing tlie pseudopodia. 



