580 HISTORY OF SYSTEMS. 



Order III. FORAMINIFERES, D'Orbigny. 



Fam. 1. STICHOSTEGUES, D'Orbigny. Genera No- 

 dosaria, Frondicularia, Lingulina, Rimulina, Vagi- 

 nulina, Marginulina, Planularia, Pavonia. 



Fam. 2. ENALLOSTEGUES, D'Orbigny. Genera Bi- 

 generina, Textularia, Valvulina, Dimorphina, Poly- 

 morphina, Virgulina,) Sphaeroidina. 



Fam. 3. HELICOSTEGUES. Genera Clavulina, Uvi- 

 gerina, Bilimina, Valvulina, Rosa lina, Rotalia, 

 Calcarina, Globigerina, Gyroidina, Truncatulina, 

 Planulina, Operculina, Soldania, Cassidulina, Ano- 

 malina, Vertebralina, Polystomella, Dendritina, Pe- 

 neroplis, Spirolina, Robulina, Cristellaria, Nonio- 

 nina, Nummulina, Siderolina. 



Fam. 4. AGATHISTEGUES, D'Orbigny. Genera 

 Biloculina, Spiroloculina, Triloculina, Articulina, 

 Quinqueloculina, Adelosina. 



Fam. 5. ENTHOMOSTEGUES, D'Orbigny. Genera 

 Amphistegina, Heterostegina, Orbiculina, Alveo- 

 lina, Fabularia. 



Class PTEROPODES, Cuvier. 



Fam. 1. HYALES, Ferussac. Genera Cymbulia, 

 Limacina, Hyalea, Cleodora, Cuvieria, Euribia, 

 Psyche. 



Fam. 2. CLIOS, Ferussac. Genera Clio, Pneumo- 

 derma. 



Class GASTEROPODES, Cuvier. 



Order I. NUCLOBRANCHES, Blainville. 



Fam. 1. FIROLIDES, Rang. Genera Firola, Garin- 



aria. 



Fam. 2. ATLANTIDES, Rang. Genus Atlanta. 

 Order II. NUDIBRANCHES, Cuvier. 



Fam. 1. PTEROSOMES, Rang. Genus Pterosoma. 

 Fam. 2. GLAUGUES, Ferussac. Genera Glaucus, 



Laniogerus, Briaraea, Eolidia, Tergipes. 

 Fam. 3. TRITONIENS, Ferussac. Genera Thethys, 



Melibe, Scyllaea, Tritoriia. 

 Fam. 4. LES DORIS, Ferussac. Genera Polycera, 



Doris, Onchidoris. 

 Fam. 5. PLACOBRANCHES, Rang. Genus Placo- 



branchus. 

 Order III. INFEROBRANCHES, Cuvier. 



Fam. 1. PHYLLIDIENS, Lamarck. Genera Phylli- 



dia, Diphyllidia. 



