126 THE FOEAMINIFERA 



water off the coast of Xorway by Professor M. Sars. 

 They are frequent in many of the deep-sea soundings 

 from all parts of the \Yorld, occurring in both low and 

 high latitudes. 



This species is typically triradiate, but occasion- 

 ally varies in having four or even five arms to the 

 test. The shell wall is coarsely sandy, and there is a 

 fairly large proportion of peroxide of iron in its com- 

 position. It varies in colour from pale to dark 

 reddish brown, or even nearly black. 



The species has been recorded, with some reserva- 

 tion, b)' Dr. de Amicis from the Lower Pliocene of 

 Sicily. (?) Loiver Pliocene, liecent. 



Genus AschemoneUa, Beady. 



Test very variable in form ; usually consisting of 

 irregular inflated sacs, either single and presenting 

 several tubulated orifices or combined in branching 

 series. Beceiit. 



Example. — A. cateiiatd, Norman sp. (Astrorhiza), 

 'Proc. Koy. Soc' vol. xxv. 1876, p. 213; Brady, 

 'Quart. Journ. Micr. Sci.' vol. xix. N.S. 1879, p. 42, 

 pi. iv. figs. 12, 13. 



This is an essentially deep-water type. The 

 species above named is widely distributed. It has an 

 irregularly branched test, with inflated chambers ; 

 and more than one orifice to each chamber is fre- 

 quentlj' seen. The shell wall is compact but thin, 

 and the interior smooth, whilst the exterior is slightly 

 rough in texture, and often coated with mud. 

 Becent. (Plate 6, fig. I.) 



