178 FORAMINIFERA 



Genus STYLOLINA Karrer, 1877 



Plate 22, figure 19 

 Genoholotype, Stylolina lapugyensis Karrer 

 Stylolina Karrer, Abhandl. k. k. Geol. Reichs., vol. 9, 1877, p. 371. 



Test attached, with the early chambers spiral, later ones 

 forming a cylindrical test; wall arenaceous; aperture formed 

 by a ring of pores near the periphery of the outer face. 



Miocene. 



Genus STACHEIA H. B. Brady, 1876 

 Plate 22, figures 20-22 



Genotype, by designation, Stacheia tnarginulinoides H. B. Brady 

 Stacheia H. B. Brady, Pal. Soc. Mon. 30, 1876, p. 107. 



Test attached, early chambers suggesting a spiral arrange- 

 ment, later ones irregular, labyrinthic; wall arenaceous, with 

 an outer imperforate layer ; aperture simple, circular, often with 

 a neck. 



Carboniferous to Lias. 



The forms included in this family are all attached, at least 

 in their early stages. It may be that some of these are more 

 or less degenerate forms and do not have the same ancestral 

 source, but all have certain characters in common. Heron-Allen 

 and Earland have figured specimens which they refer to 

 Haddonia in which the early stages are Textularian. If these 

 are really the same, Haddonia should be transferred to the 

 Textulariidae. As Chapman's figure and description indicate 

 that the originals had a coiled young, the genus is left here 

 until these points are more clearly defined. 



FAMILY 21. ORBITOLINIDAE 



Test usually conical ; early chambers spiral, later ones annular, 

 subdivided into chamberlets, the central portion of the test with 

 irregular chambers; wall finely arenaceous, siliceous or 

 calcareous; apertures on the basal side of the test, multiple in 

 higher forms. 



