284 FORAMINIFERA 



Genus SIDEROLITES Lamarck, 1801 



Plate 42, figures 5-7; plate 44, figure 2 

 Genoholotype, Siderolites calcitrapoides Lamarck 

 Siderolites Lamarck, Syst. Anim. sans Vert., 1801, p. 376. 

 Siderolina Defrance, Diet. Sci. Nat., vol. 32, 1824, p. 180. 

 Calcarma (part) of authors. 



Test in the early chambers similar to Calcarina, spines later 

 added at right angles to the peripheral ones, chambers soon 

 covering the dorsal side ; wall calcareous, perforate, with pillars 

 in some species ending at the surface in raised bosses; aperture 

 in the adult at the basal edge of each chamber, finally 

 represented by the larger circular openings of the chamber wall. 



Cretaceous to Recent. 



Genus PELLATISPIRA Boussac, 1906 



Plate 55, figures 12-15 

 Genotype, by designation, Pellatispira douviUei Boussac 

 Pellatispira BousSAC, Bull. Soc. Geol. France, ser. 4, vol. 6, 1906, p. 91. 

 Nummulites (part) Hantken, 1876 (not Lamarck). 



Test planispiral, bilaterally symmetrical, the earliest coil with 

 the chambers close coiled, later ones loosely coiled with a mass 

 of shell material between, separating the coils; lateral walls 

 with pillars, appearing as bosses at the surface. 



Tertiary. 



Genus BACULOGYPSINA Sacco, 1893 



Plate 42, figures 8-12; plate 44, figure 3 

 Genotype, by designation, Orbitolina sphaeridata Parker and Jones 

 Baculogypsina Sacco, Bull. Soc. Beige Geol., vol. 7, 1893, p. 206. 

 Orbitolina Parker and Jones, 1860 (not d'Orbigny). 

 Tinoporus of authors (not Montfort). 



Test in the early stages like Calcarina, very early developing 

 four or more large spines which increase in size independent 

 of the chambers, chambers quickly covering the whole surface, 

 supplementary skeleton well developed, consisting of pillars at 

 the angles of the chambers ending in rounded bosses at the 

 surface and connected with surrounding ones by radial connect- 

 ing rods giving a reticulate appearance to the test. 



Tertiary and Recent. 



