FAMILY 5. HYPERAMMINIDAE 83 



C. Test iri-egularly branching, attached to inside of other foraminiferal 



tests, chitinous. 



1. Test simply branched and winding Ophiotuba. 



2. Test anastomosing Dendrotuba. 



D. Test a mass of anastomosing tubes, arenaceous Syringammina. 



Subfamily 1. Hyperammininae 

 Test free, simple 



Genus HYPERAMMINA H. B. Brady, 1878 

 Plate 6, figures 1-3 



Genoholotype, Hyperammina elongata H. B. Brady 



Hyperammina H. B. Brady, Ann. Mag. Nat. Hist., ser. 5, vol. 1, 1878, 



p. 433. 

 Rhabdopleura (?) Dawson, Ann. Mag. Nat. Hist., ser. 4, vol. 7, 1871, 



p. 86. 

 Bactrammina Eimer and Fickert, Zeitschr. Wiss. Zool., vol. 65, 1899, p. 



673 (genoholotype, Hyperammina elongata (H. B. Brady). 



Test free, elongate, consisting of a proloculum and long un- 

 divided tubular second chamber ; wall of sand grains, often with 

 sponge spicules, the amount of cement varying in different 

 species, interior with a chitinous lining and smoothly finished; 

 aperture formed by the open end of the tube. 



Cambrian ( ?) Silurian to Recent. Species are mostly char- 

 acteristic of cold or deep water. Widely distributed. Abundant 

 in the Pennsylvanian, and occurring in many formations to the 

 present seas. 



Genus NUBECULARIELLA Awerinzew, 1911 



Plate 7, figure 7 

 Genoholotype, Nuberculariella birulai Awerinzew 



Nubeculariella Awerinzew, Mem. Acad. Sci. St. Petersbourg, ser. 8, vol. 

 29, pt. 3, 1911, p. 8. 



Test consisting of an indistinct proloculum and curved cyl- 

 indrical tube; wall of chitin with sand grains of various sizes 

 attached to the exterior ; aperture rounded with a slightly flaring 

 lip. 



Recent. Arctic. 



