rxHIZOPODA. 



13 



Fig, 3. 



Various forms of Foraminifera : — a, Lagena striata; a' 

 Nodosaria rugosa ; h, Marginulina { = Cristdluria) raphanus ; 

 h\ longitudinal section of shell of do. ; c, Pulystomella crispa, 

 with its pseudopodia protruded ; d, Nummidites lenticularis, 

 shown in horizontal section ; e, Cassidulina Icevigata ; f, Textu- 

 laria globuhsa; gr, Mdlolina seminulum ; g', animal of Miliolina 

 removed from its shell. 



7. Unilocular Foramfnlfera The Uni- 

 locular Foraraimfera may be said to constitute an 

 intermediate group between the Polythalamia and 

 Arcellina ; the form denominated Gromiia, for 

 example, scarcely differing from Difflugia or Ar- 

 cella, save in the greater length and tenacity of its 

 pseudopodia. A better example of these Ehizo- 

 pods is furnished by Lagena, which may be suffi- 

 ciently characterised by the beautiful flask-like 

 form of its shell {Jig, 3, a), the external surface of 



