Remarhs on the Foraminifera. By Prof. T. Rupert Jones. 89 

 I. FORAMINIFERA IMPERFORATA VEL PORCELLANA. 



I. NCBECrLAEIDA. 



Squamulina, Schultze. Monothalanious. 

 Nubecularia, Defiance. Fixed. 



II. MiLIOLIDA. 



Vertebralina, D'Orb. Dimorphous usually. 



a. ArtLculina, D'Orb. Dimorphous. 

 Cormispiia, Schultze (restricted). Monothalaraou3. 

 Miliola, Lamarck. 



a. Uniloeulina, D'Orb. Monothalamous. 



b. Biloculiua, D'Orb. 



c. Triloculiua, D'Orb. 



d. Quinqueloculina, D'Orb. 



e. Cruciloculina, D'Orb. 

 /. Spiroloculina, D'Orb. 



g. Ceratospiruliua, Ehrenberg. Dimorphous. 

 Hauerina, DOrb. 

 Fabularia, Defrance. 



III. Peneroplida. 



Peneroplis, De Montfort. 



a. Spirolina, Lamarck (restricted). Dimorphous. 



b. Dendritina, D'Orb. 



IV. Orbiculinida. 



Orbiculina, Lamarck. 

 Orbitolites, Lamarck. 

 a. Pavonia, D'Orb. 

 Alveolina, D'Orb. 



V. Dactyloporida. 



Haploporella, Giimbel. 



Dactyloporella, Giimb. (Dactylopora auctorum in parte.^ 



Thyrsoporella, Giimb. 



Gryroporella, Giimb. 



Cylindrella, Giimb. 



Uteria, Micheliu. 



Acicularia, D'Aichiac. 



Verticillipora (?), Mantell. 



Receptaculites, Defrance. 



Archaeocyathus, Billings. 



II. FORAMINIFERA ARENACEA. 

 I. Parkeeiada. 



Parkeria, Carpenter. 

 Loftusia, Brady. 



II. LiTUOLIDA. 



Endothyra, Phillips. 

 Involutiua, Terquem. 

 Trochammina, Parker and Jones. Monothalamous in some forms. 



a. Webbina, D'Oib. (restricted). Fixed. 

 Valvulina, D'Orb. Sometimes dimorphous. 

 Tetrataxis, Ehrenberg. 

 Ataxophragmium, Reuss (sandy Bulimina). 

 Plecanium, Reuss (sandy Te.dularia). 



