FORAMINIFERA OF THE ATLANTIC OCEAN 15 



Genus SIPHOGENERINA Schlumberger, 1883 

 Bull. 104, pt. 4, pp. 172-175. 



Genus ANGULOGERINA Cushman, 1927 

 Bull. 104, pt. 4, p. 170 {Uvigerina angulosa Williamson). 



Genus TRIFARINA Cushman, 1923 

 Bull. 104, pt. 4, p. 99. 



Family 32. ELLIPSOIDINIDAE 



Test with the wall calcareous, finely perforate, variously formed, 

 the aperture usually narrow, elongate, curved in the outline of a semi- 

 ellipse, a hollow tube or rod-hke structure, sometimes in the form of 

 a curved plate connecting the various chambers, similar in general to 

 that found in the Buliminidae. 



Genus PLEUROSTOMELLA Reuss, 1860 



. Bull. 104, pt. 3, pp. 49, 50. 



Genus ELLIPSOLAGENA A. Silvestri, 1923 



Bull. 104, pt. 4. (Here may be placed some of the species recorded 

 under Lagena.) 



Family 33. ROTALIIDAE.— Family 34. AMPHISTEGINIDAE.— 

 Family 35. CALCARINIDAE.— Family 36. CYMBALOPORET- 

 TIDAE. (To be included in Part 8 of this Bulletin.) 



Family 37. CASSIDULINIDAE 



Test at least in the early stages, trochoid, later chambers in some 

 genera alternating on the dorsal and ventral surfaces of the test or 

 even uncoiling; wall calcareous, perforate; aperture in the early 

 stages of the simpler genera at the margin of the ventral face of the 

 chamber but projecting into the apertural face in a direction gradu- 

 ally becoming parallel to the periphery, elongate. 



Subfamily 1. Ceratobulimininae 



Test rotaliform throughout. 



Subfamily 2. Cassidulininae 



Test with the chambers alternating on the two sides of the plane 

 of coiling. 



Genus CASSIDULINA d'Orbigny, 1826 



Bull. 104, pt. 3, pp. 122-132 (except C.par]ceriana= Cassidulinoides) . 



