FORAMINIFERA OF THE ATLANTIC OCEAN 



9 



region which is filled; wall smooth, distinctly but finely perforate; 

 aperture, a narrow slit at the base of the apertural face. 

 . Diameter usually less than 0.50 mm.; thickness about 0.18 mm. 

 This is a very common species in the North Sea and about the 

 British Isles, well figured by Williamson. It is somewhat difficult 

 to place earlier records without figures, but this has probably been 

 recorded from this area. It is very close to the species of Elpliidium 

 from the same area such as is referred to by Heron-Allen and Earland 

 in their report from the west of Scotland as '' Polystomella faha." 

 It is apparently not found on the western side of the Atlantic. 



Nonion germanicum — Material examined 



NONION SLOANH (d'Orbigny) 



Plate 3, figures 6-8 



Nonionina sloanii d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 1839, " Foraminiferes," p. 68, pi. 6, figs. 18, 186w.— Cushman, Publ. 

 291, Carnegie Instit., Washington, 1919, p. 48; Publ. 344, 1926, p. 79. 



This may be a form of N. scaphum (Fichtel and Moll). It differs 

 from N. grateloupi in the broader apertural face and the narrower 

 form in front view. d'Orbigny described and figured this species 

 from Jamaica as rare, and mentioned that it was like a similar form 

 occurring fossil at Dax. I had material referred to this species from 

 Late Tertiary marl, from the gorge of the Yumuri River, Matanzas, 

 Cuba and from Bluff 2, Cercado de Mao, Santo Domingo. It also 

 occurred in recent collections from San Juan Harbor, Porto Rico. 



It may prove to be only a more inflated, but narrower form of 

 N. grateloupi (d'Orbigny). 



Very close to this is the species described by d'Orbigny from shore 

 sands of Cuba and Jamaica as Nonionina hrovmii. It is a somewhat 

 inflated form and probably is a synonym of N. sloanii. 



Nonion sloanii — Material examined 



