FAMILY 6. REOPHACIDAE 97 



Genus AMMOFRONDICULARIA Schubert, 1902 

 Plate 8, figure 21 



Genoholotype, Ammofrondicidaria anyusta Schubert 



Awmnfrondicvlaria Schubert, Beitr. Pal. Oesterr.-Ung., vol. 14, 1902, 

 p. 24. 



Test free, compressed, elongate, consisting of a series of over- 

 lapping chambers ; wall arenaceous ; aperture elliptical, terminal. 



Lower Oligocene. South Tyrol. 



This is essentially a compressed, overlapping form in other 

 respects resembling Reophax. 



Genus TURRICLAVULA Rhumbler, 1911 

 Plate 8, figure 20 



Genoholotype, Turriclavula intcrjecta Rhumbler 

 Turriclavula Rhumbler, Plankton Exped., vol. 3, 1909 (1911), p. 421. 



Test free, elongate, of several chambers in a rectilinear series ; 

 wall chitinous, with some scattered arenaceous material on the 

 exterior; aperture terminal, elongate elliptical. 



Recent. 



Genus NODELLUM Rhumbler, 1913 

 Plate 8, figure 22 



Genotype, by designation, Reophax metnbranacea H. B. Brady 

 Nodellmn Rhumbler, Plankton Exped., vol. 3, 1913, p. 473. 

 Reophax (part) H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, 

 p. 53. 



Test free, elongate, made up of a rectilinear series of inflated 

 chambers; wall entirely chitinous; aperture circular, terminal. 



Cretaceous, Recent. The living species in cold or deep water, 

 widely distributed. 



The various forms included in this family probably had their 

 origin in such forms as Hyperanimina by the division of the 

 tubular chamber into many small chambers. The simpler more 

 primitive genera of the family such as AschemoneUa and 

 Kalaniopsis are often imperfectly divided into chambers. In 

 the completely divided forms, there is a regular series from the 

 simple chamber of Reophax to Haplostiche which is labyrinthic 

 and has a cribrate aperture. The entirely chitinous Nodellum 



