The Sarcodina 263 





-.^^-i. 



"■•K i. 



/ F 





• / . 



Fig. 5. 43. Allogromiidae: A-D. Mlcrogromia elegantula Penaid. upper 

 and lateral views (A, B), organism outside test (C), and cyst (D); x920 

 approx. (after Valkanov). E. Micrometes pahidosa Cienkowski, test 16-17;a 

 long (after Penard). F. Completion of fission within test of M. paluclosa (after 

 Valkanov). G. Rhyiichogroniia (Gromia) linearis (Penard), a number of 

 nuclei, ingested diatoms (after P.). H, I. Diplogromia (Gromia) brunneri 

 (Blanc), test 60-250/i long, uninucleate organism, polar view showing pseu- 

 dopodia (after Penard). J. LieberkUhnia wagneri Claparede and Lachmann, 

 specimen with test 96/j. long (after Penard). 



enough to play a significant part in taxonomy. On the basis of structural 

 features of the test, 50 families have now been recognized.^ 



The possession of arenaceous tests more or less completely separates a 

 number of these families from others with a calcareous test. The absence 



* For a detailed consideration of taxonomy, Cushman's (30) monograph may be 

 consulted. 



