160 FORAMINIFERA 



3. Test in the adult with long peripheral extensions. 



Cormispire lla. 



4. Test in the adult with chambers in a rectilinear series. 



Nodobacularia. 



B. Some at least of the chambers a half coil in length. 

 1. Test with a thin plate between the coils. 



a. Two chambers in a coil in the adult. . . . SpirojAhalmidium. 

 h. More than two chambers in the adult. 



( 1 ) . Chambers simple, not annular Ophthalmidium. 



(2). Chambers divided into chamberlets, annular. 



Discospirinia. 



C. Test generally planispiral divided into chambers. 



1. Several to a coil, not complanate Planispirina. 



2. Test broadly complanate, becoming annular Renulina. 



3. Test somewhat complanate, becoming rectilinear. Vertebralina. 



II. Test attached or becoming free. 



A. Early chambers somewhat coiled, later irregular. 



1. Later chambers irregularly coiled Nubecularia. 



2. Later portions narrow, branching, tubular Cornuspiramia. 



B. Early chambers not definitely coiled. 



1. Several chambers. 



a. Branched Calcituba. 



h. Irregular inflated chambers Silvestria. 



2. A single chamber Squamulina. 



Subfamily 1. Cornuspirinae 



Test made up of a proloculum and an elongate, planispiral, 

 tubular second chamber. 



Genus CORNUSPIRA Schultze, 1854 



Plate 20, figures 1, 2; plate 21, figure 1 



Genotype, by designation, Conmspira plmwrbis Schultze 



Comuspira SCHULTZE, Organismus Polythal., 1854, p. 40. 



Orbis (part) Philippi, Enum. Moll. Siciliae, vol. 2, 1844, p. 147. 



Operculina (part) Czjzek, in Haidinger's Nat. Abhandl., vol. 2, 1848, 

 p. 146. 



Spirillina (part) Williamson, Rec. Foram. Great Britain, 1858, p. 91. 



Test consisting- of a proloculum followed by a long planispiral- 

 ly coiled second chamber, rounded or complanate; wall 

 calcareous, imperforate; aperture formed by the open end of 

 the chamber, sometimes constricted and with a thickened lip. 



Carboniferous ( ?) Jurassic to Recent. 



