PLATE. i. 

he figures given show the ontogeny of aeg genera of zn wre to hee 
comparative stages in "development. 1, Lagena, the primitive radical ; 
Marginulina; 6-9, Cristellaria; 10-13, eis a; 14-17, Pol ynorphia ; Gb, Dimor phina ; the 
embryo nic s stage, the ee is represented i in ae quus row and may be — to Lagena 
above, may be compared to Nodo- 
su pr row the true generic earache are definitely el on at 

pr 
sara. [n the neanic recs in 
least as regards progressive charact 
