THE FAMILY MILIOLID^ 81 



(with an arenaceous test) and Baiiiulina (with a 

 hyahne test). A typical specimen of C. pol/jmoijjha 

 measures "8 mm. in length. The lengths of the 

 chambers in two separate individuals were "242 mm. 

 and "269 mm. respectively, and their breadths '128 

 mm. and '095 mm. 



This species is of especial interest on account 

 of the valuable physiological researches conducted 

 upon it by Schaudinn, in tracing the progressive 

 changes in the division of the nucleus. The affinity 

 of this genus is very closely connected with Nubecu- 

 larla itself, especially in those irregular and inflated 

 forms which have numerous apertures sporadically 

 placed on the surface of the test, such as Niihecularia 

 BradTji, Millett, and N. iwvorossica, Karrer and 

 Sinzow. Becent. (Plate 2, figs. B, C, D.) 



Genus Nuhecidaria, Defeance. 



Test spiral, straight, or irregular ; usually ad- 

 herent ; septate. Surface often encrusted wdth sand. 



The elongate adherent species are plentiful as 

 fossils in certain Liassic and Oolitic deposits, and 

 the coarse thick-walled forms constitute important 

 calcareous strata in the Miocene sands of South 

 Russia. 



At the present day this genus is usually repre- 

 sented by species found almost restrictedly in the 

 shallow-water sands of tropical or warm areas, and 

 are rarely found in very deep water. Carho-Fermian 

 to Recent. 



Examples. — N. lucifuga, Defrance, ' Diet. Sci. 



G 



